document_title: Tin Woodman

question_text: name of the tin man in wizard of oz

question_tokens: name of the tin man in wizard of oz

text: Tin Woodman

text: The books[edit]

text: Originally an ordinary man by the name of Nick Chopper (the name first appearing in The Marvelous Land of Oz), the Tin Woodman used to make his living chopping down trees in the forests of Oz, as his father had before him. The Wicked Witch of the East enchanted his axe to prevent him from marrying his sweetheart, after being bribed by the lazy old woman who kept the Munchkin maiden as a servant, and did not wish to lose her. (In a later book of the series, The Tin Woodman of Oz, the woman is said to be the Witch's servant, and it is the Witch herself who decides to enchant Nick's axe.) The enchanted axe chopped off his limbs, one by one. Each time he lost a limb, Ku-Klip the tinsmith replaced it with a prosthetic limb made of tin. Finally, nothing was left of him but tin. However, Ku-Klip neglected to replace his heart. Once Nick Chopper was made entirely of tin, he was no longer able to love the lady he had fallen for.

text: In The Wonderful Wizard of Oz, Dorothy Gale befriends the Tin Woodman after they find him rusted in the forest, as he was caught in rain, and use his oil can to release him. He follows her to the Emerald City to get a heart from The Wizard. They are joined on their adventure by the Scarecrow and the Cowardly Lion. The Wizard sends Dorothy and her friends to the Winkie Country to kill the Wicked Witch of the West. The Tin Woodman's axe proves useful in this journey, both for chopping wood to create a bridge or raft as needed, and for chopping the heads off animals that threaten the party. When the Winged monkeys are sent by the Witch of the West against the group, they throw the Tin Woodman from a great height, damaging him badly. However Winkie Tinsmiths are able to repair him after the death of the Witch.

text: His desire for a heart notably contrasts with the Scarecrow's desire for brains, reflecting a common debate between the relative importance of the mind and the emotions. This occasions philosophical debate between the two friends as to why their own choices are superior; neither convinces the other, and Dorothy, listening, is unable to decide which one is right. Symbolically, because they remain with Dorothy throughout her quest, she is provided with both and need not select.[1] The Tin Woodman states unequivocally that he has neither heart nor brain, but cares nothing for the loss of his brain. Towards the end of the novel, though, Glinda praises his brain as not quite that of the Scarecrow's.

text: The Wizard turns out to be a "humbug" and can only provide a placebo heart made of silk and filled with sawdust. However, this is enough to please the Tin Woodman, who, with or without a heart, was all along the most tender and emotional of Dorothy's companions (just as the Scarecrow was the wisest and the Cowardly Lion the bravest). When he accidentally crushes an insect, he is grief-stricken and, ironically, claims that he must be careful about such things, while those with hearts do not need such care. This tenderness remains with him throughout the series, as in The Patchwork Girl of Oz, where he refuses to let a butterfly be maimed for the casting of a spell.[2]

text: When Dorothy returns home to her farm in Kansas, the Tin Woodman returns to the Winkie Country to rule as emperor. Later, he has his subjects construct a palace made entirely of tin — from the architecture all the way down to the flowers in the garden.

text: Baum emphasized that the Tin Woodman remains alive, in contrast to the windup mechanical man Tik-Tok Dorothy meets in a later book. Nick Chopper was not turned into a machine, but rather had his flesh body replaced by a metal one. Far from missing his original existence, the Tin Woodman is proud (perhaps too proud) of his untiring tin body.

text: A recurring problem for the Tin Woodman in The Wonderful Wizard of Oz and afterward was his tendency to rust when exposed to rain, tears, or other moisture. For this reason, in The Marvelous Land of Oz the character has himself nickel-plated before helping his friend the Scarecrow fight to regain his throne in the Emerald City. Even so, the Tin Woodman continues to worry about rusting throughout the Oz series.

text: This is inaccurate, in that tin does not rust; only iron does. This may reflect the usage where an object made of iron or steel but coated with tin (in order to prevent rusting) is called a "Tin" object, as a "tin bath", a "tin toy", or a "tin can"; thus, the Tin Woodman might be interpreted (in English, at least) as being made of steel with a tin veneer. One passage in The Road to Oz, by Baum himself, wherein the Woodman attends Ozma's birthday party accompanied by a Winkie band playing a song called "There's No Plate Like Tin," strongly implies that this is the case. Another explanation may be that the Woodman is chiefly made of tin, with iron joints; in some of the illustrations, his joints are a different color from the rest of his body.[3] In Alexander Volkov's Russian adaptation of The Wonderful Wizard of Oz, Volkov avoided this problem by the translation of "The Tin Woodman" as the "Iron Woodchopper".

text: The Tin Woodman appeared in most of the Oz books that followed. He is a major character in the comic page Baum wrote with Walt McDougall in 1904-05, Queer Visitors from the Marvelous Land of Oz. In Ozma of Oz, he commands Princess Ozma's army, and is briefly turned into a tin whistle. In Dorothy and the Wizard in Oz, he serves as defense counsel in the trial of Eureka. He affects the plot of a book most notably in The Patchwork Girl of Oz, in which he forbids the young hero from collecting the wing of a butterfly needed for a magical potion because his heart requires him to protect insects from cruelty. Baum also wrote a short book titled The Scarecrow and the Tin Woodman, part of the Little Wizard Stories of Oz series for younger readers.

text: In The Tin Woodman of Oz, Nick Chopper finally sets out to find his lost love, Nimmie Amee, but discovers that she has already married Chopfyt, a man constructed partly out of his own dismembered and discarded limbs. For the Tin Woodman, this encounter with his former fiancée is almost as jarring as his experiences being transformed into a tin owl, meeting another tin man, Captain Fyter, and conversing with his ill-tempered original head.

text: Baum's successors in writing the series tended to use the Tin Woodman as a minor character, still ruling the Winkie Country but not governing the stories' outcome. Two exceptions to this pattern are Ozoplaning with the Wizard of Oz, by Ruth Plumly Thompson, and Lucky Bucky in Oz, by John R. Neill. The biggest exception is in Rachel Cosgrove's The Hidden Valley of Oz, in which the Tin Woodman leads the forces in the defeat of Terp the Terrible and cuts down the Magic Muffin Tree that gives Terp his great size.

text: The fact that Nick includes the natural deaths of his parents in the story of how he came to be made of tin has been a major element of debate. In his eponymous novel, he proclaims that no one in Oz ever died as far back as Lurline's enchantment of the country, which occurred long before the arrival of any outsiders such as the Wizard. (It should be noted, however, that although the living creatures of Oz do not die of age or disease, they may die of accidents or be killed by others.)

text: The Tin Man in later fiction[edit]

text: In the 1998 novel The Tin Man, by Dale Brown, the eponymous protagonist is a power-armored vigilante whom the media and police have dubbed The Tin Man for his physical resemblance to the Wizard of Oz character.

text: The Tin Woodman is a minor character in author Gregory Maguire's 1995 revisionist novel Wicked: The Life and Times of the Wicked Witch of the West, its 2003 Broadway musical adaptation and Maguire's 2005 sequel Son of a Witch. In the book, Nessarose - the Wicked Witch of the East - is seen enchanting the axe to swing around and chop off Nick Chopper's limbs. She does this for a peasant woman who wishes to stop her servant, probably Nimmie Amee, from marrying Nick Chopper. This seems to be close to the Tin Man's origin in the original books, but from the Witch's perspective.

text: In the musical adaptation of Wicked the Tin Man is revealed to be Boq, a Munchkin whom Nessarose, the Wicked Witch of the East, fell in love with when they were at school together. When she discovered his heart belonged to Glinda, she botched a spell that was meant to make him fall in love with her by taking his heart, but instead shrunk his heart to nothing by taking it away without 'giving' it to Nessa. To save his life, Elphaba, the Wicked Witch of the West, was forced to turn him into tin. Not understanding her reasons, he pursues Elphaba with a single-minded vengeance for his current form. The Tin Man's humble origin in the novel conflicts with his having been the aristocratic Boq.

text: In Oz Squad, Nick was shown in a sexual relationship with "Rebecca Eastwitch" in order to get closer to Nimmie Amee and attempt to elope with her.

text: A darker twist to the beloved woodman is made by author James A. Owen in the fourth installment of his series, The Chronicles of the Imaginarium Geographica when his identity is revealed to be Roger Bacon.[4]

text: The Tin Woodman appears in the 2011 TV series Once Upon a Time episode "Where Bluebirds Fly" portrayed by Austin Obiajunwa (as a teenager) and by Alex Désert (as an adult).[5] In this version he goes by the name Stanum (derived from the Latin world "stannum", which means "tin").

text: Since youth, Stanum has been a woodcutter and one day when he first met Zelena, the daughter of another woodsman, he finds out that Zelena has magic and befriends her, regardless of whatever the children say about Zelena, who they see as a freak. Many years later, Stanum, now a man, is punished by the Wicked Witch of the North for chopping down a tree in her domain, and his body slowly begins to transform into tin. To prevent himself from completely becoming tin, Stanum seeks out help from Zelena (now the Wicked Witch of the West) at the Emerald City of Oz. Zelena agrees to help him seek out the Crimson Heart, which can save him. During their quest, Stanum tells Zelena that she doesn't have to be lonely but she is doing her best to deny his advice. Suddenly, a lion comes of nowhere to attack Stanum, and Zelena uses her magic to make the lion go away (at this point the lion has become as Zelena would put it, cowardly). When they finally arrived to the location of the Crimson Heart, the two learned that the only way to make it work is through the absorption of another person's magic. Unfortunately Zelena's actions and selfish greed for magic causes her to betray Stanum, whom she suspect was aligned with Dorothy by keeping the Crimson Heart for herself, leaving Stanum to transform into the Tin Man permanently. Some time later, when Robin Hood arrives in Oz in the episode "Heart of Gold", the Tin Man is seen on the side of the Yellow Brick Road, torn apart.

text: Depictions on stage and screen[edit]

text: In 1902, Baum helped to adapt The Wizard of Oz into a wildly successful stage extravaganza. David C. Montgomery played the Tin Woodman, Niccolo Chopper (who played the piccolo), opposite Fred Stone as the Scarecrow, and the team became headliners. The piccolo would continue to appear in early adaptations, such as the 1910 film, but was largely forgotten, and the name "Niccolo" never appeared in one of the books. Revisionist books like Oz Squad have referred to him as "Nicholas," a name not found in the books, either.

text:
In the classic 1939 film The Wizard of Oz, the Tin Man was played by actor Jack Haley. Originally, Ray Bolger was cast to play the role of Tin Man, despite his desire to play the Scarecrow. Buddy Ebsen was, at the time, cast as Scarecrow, and was convinced to swap roles with Bolger.[6] While this pleased Bolger, it led to medical problems for Ebsen. The Tin Man's makeup originally contained aluminum powder which got into Ebsen's lungs, bringing him to the edge of death. He was rushed to a hospital and had to give up the role. Despite this, and the fact that the Tin Man's makeup was changed to a safer aluminum paste, Ebsen went on to outlive both Bolger and Haley. Haley based his breathy speaking style in the movie on the voice he used for telling his son bedtime stories. His portrayal of the character is by far the most famous. There is no explanation in the film of how the Tin Man became the Tin Man. It is subtly implied that he was always made of tin; the only reference to the tinsmith is the Tin Man's remark "The tinsmith forgot to give me a heart". Unlike the costumes of the Scarecrow (in the National Museum of American History) and Cowardly Lion (two sets in private hands), that of the Tin Man "was largely destroyed".[7][8] Haley also portrayed the Tin Man's Kansas counterpart, Hickory (one of Aunt Em and Uncle Henry's farmworkers). Screenwriter Noel Langley created this character for the film.[9] Hickory helps Zeke (Lion's alter ego) lower a bed into its place on a wagon at the farm. Unlike Zeke, Hickory and Hunk (Scarecrow's alter ego) lose their hats with Uncle Henry as they struggle to open the cellar when the tornado approaches the farm. He reunites with Dorothy when she awakes from being unconscious. Hickory is seen with Aunt Em, Uncle Henry, Zeke, and Hunk as well as Professor Marvel (The Wizard's alter ego).
In the original Broadway version of The Wiz, Tiger Haynes played the Tinman, a human woodcutter who became tin after the Wicked Witch of the East cursed his axe to chop him up (as in the book). Nipsey Russell played the Tinman in the film adaptation of The Wiz. In this version, as in the 1939 movie, there is no explanation of how he became tin, just a reference of the "genius who created me". He worked as the carnival barker and when the park was closed, he was abandoned, rusted and squeezed by his fourth wife, "Teeny" (a heavy tin sculpture of a fat lady). He was saved by Dorothy and the Scarecrow. Ne-Yo played the Tinman in the TV special The Wiz Live!. This version portrayed him as a construction worker on whom the Wicked Witch of the East developed an unrequited crush. When she found out he already had a girlfriend, "Bertha", she became so jealous, she turned him into a heartless tinman. The Witch boasted afterwards that if she couldn't have his heart, then no one could. Like Jack Haley in the 1939 movie, Ne-Yo also played one of Aunt Em's farmhands - John, who walks with a metal leg brace.
Other notable actors who have played the Tin Woodman include Oliver Hardy in a 1925 silent version of The Wizard of Oz directed by and starring Larry Semon, in which a villainous farmhand briefly fell into a tin pile and emerged as a "Tin Woodsman" [sic]. In subsequent scenes the tin was removed and he became "Knight of the Garter". In the 1960 television adaptation of The Land of Oz, he was played by vaudeville comedian Gil Lamb; in the 1969 film, The Wonderful Land of Oz he was played by Al Joseph; and in the 1985 film Return to Oz, he was played by Deep Roy, a little person who was able to fit inside a costume that looked nearly identical to John R. Neill's artwork.
In the 1961 animated TV series, Tales of the Wizard of Oz and its sequel, the 1964 NBC animated television special Return to Oz, the Tin Man (here named Rusty) was voiced by Larry D. Mann.
In the 1970s, the Tin Woodman appeared in a series of short animated educational films about heart health from Joleron Productions.
In an episode of The World's Greatest Super Friends, Superman temporarily became the Tin Man after a tornado took him, Wonder Woman, and Aquaman to Mister Mxyzptlk's planet of Oz.
In a 1981 episode of Scooby-Doo and Scrappy-Doo, Scrappy is dressed as the Tin Man after a tornado took him, Shaggy, and Scooby to "Ahz", a direct spoof of Oz with a different spelling by its enunciation.
In 1985, the Tin Woodman appeared in the educational film Act on Arthritis as well as in promotional commercials.
Roger Daltrey portrayed this character in the 1995 television stage performance The Wizard of Oz in Concert: Dreams Come True. The Kansas farmworker Hickory does not appear in this production. Daltrey performed a rock and roll tempo of "If I Only Had a Heart" in which he swung his microphone mimicking his Who persona. He also performed the bridge verses sung by the Tin Man in Nathan Lane's long version of "If I Only Had the Nerve". Toward the end, he hugged the Wizard (Joel Grey) saying to him "Thank you from the bottom of my heart!".
In 1996, they made a cartoon animated The Oz Kids. He has a son named Tin Boy. Like his father he can cut wood with his ax. And he has to be careful with water and snow or he'll be rust. His voice played by Andy Milder.
Hiroki Tsujiai from Ultra Maniac dresses as the Tin Man in the costume party.
James Kall portrayed the Tin Man in the 2001 ABC miniseries Life with Judy Garland: Me and My Shadows.
The Muppet Gonzo plays a similar role, the Tin Thing, in 2005's television film The Muppets' Wizard of Oz. In this version, he is the Wicked Witch's research assistant, transformed into a robot to prevent him wanting a day off to marry Camilla. Gonzo's other role is himself. He appears at the end of this film in the Muppets' show.
In 2006, the Tin Man was the protagonist in a pair of television commercials for Chef Boyardee brand canned Beef Ravioli, in a costume identical to the design used in the 1939 Oz film. In the commercials, the Tin Man (played by Australian actor David Somerville) is pursued by groups of children due to the fact that an oversized Beef Ravioli can label has been affixed to the back of his cylindrical torso (which he doesn't notice until the midpoint of the first commercial); thus, he appears to be a very large, mobile can of ravioli. In the first ad, the Tin Man escapes from his pursuers only to discover that the building he ducked into is an elementary school cafeteria full of hungry children and a teacher. The second ad begins with the Tin Man running through a residential neighborhood, accidentally adding to his pursuers when he stumbles across a backyard birthday party; after fleeing across a golf course (while dodging balls from the driving range), he is cornered in another backyard and threatened with a garden hose (playing on the Tin Man's classic weakness of rusting). As the scene shifts to the image of a Beef Ravioli can, sounds of water hitting metal and the Tin Man's cries for help are heard.
In 2006, the Chicago Under Ground Film Festival premiered Lee Lynch’s feature film titled Transposition of the Great Vessels. Based on the story of his own parents, who moved from Redding to Los Angeles, in hopes of making a better life. His father wanted to work for the forest service, and his mother wanted to be a cook, but their baby was born with a rare heart condition. They were forced to give up those dreams, and make choices that would give them insurance and stability. A naturalist movie interspersed with dream sequences; the “Tin Woodman” makes an appearance while on his deathbed, at UCLA Medical Center.
At Sundance of 2007, a film premiered by young director Ray Tintori entitled Death to the Tinman. It is a somewhat modernized retelling that takes place at sometime in the 1900s, in the town Verton, rather than Oz. However, the book of the same name, which tells the origins of the character, is cited by opening intertitles as the source. Although the basic premise is nearly identical, much of the details and all names and locations have been changed. This is partially due to the film's satirical look at criminal reenactments, as it states at the beginning that names "have been changed to protect the innocent." Perhaps the most interesting change that story makes, though, is the origin of the curse upon the Tinman's Axe, which is changed from being the Witch to being a curse from God. This film won a short filmmaking award at Sundance.
A 2007 CG animated short film called "After Oz",[10] produced by the film students at Vancouver Film School, centered on a stylized version of the Tin Man, after he has received his heart from Oz. The movie shows him moving through a colorful Oz city with his brand-new mechanical heart, before meeting a reddish female Tin Woman (or robot?) to whom he gives the heart. She proceeds to cruelly play with the heart.
An internet-collaboration, CG animated feature based on Baum's book The Tin Woodman of Oz was produced by A:M Films, and completed in 2009.
In 2010, Whitestone Motion Pictures[11] produced a 23-minute live-action short film, Heartless: The Story of the Tin Man. The film is based on the book The Tin Woodman of Oz, where Woot the Wanderer visits the Tin Man and asks how he came to be made of tin. In the film, the Tin Man appears to be more steam- or coal-powered. His chest cavity is covered by a door which reads "Pedudoe Tin Co." but this is a reference to the workings of the film company, and not a reference to any Oz book or material. The movie was made available for free viewing online and free downloading of its soundtrack.
In the 2013 prequel, Oz the Great and Powerful, although the Tin Woodman does not physically appear, the film introduces his creator, the Master Tinker, portrayed by Bill Cobbs.[12]
Tin Man appears in the animated film Legends of Oz: Dorothy's Return (which is based on Dorothy of Oz), voiced by Kelsey Grammer.
The Woodsman, a 2012 stage play written by James Ortiz with music by Edward W. Hardy, tells the backstory of the Tin Man, using puppetry, movement, and music. The play has received multiple Off Broadway productions, and won a 2016 Obie Award for Ortiz's puppet design.[13]
In the TV series Emerald City, the Tin Woodman equivalent is Jack (Gerran Howell), a friend of the enigmatic Tip, who helps 'him' escape from his imprisonment by a witch. When it is revealed that Tip is actually a girl whose true identity was suppressed by a potion, her strained emotional state causes her to push Jack over a balcony after he kisses her. Jack is subsequently found and rebuilt by scientists in a cyborg-like state; his head and right arm are still organic, but his heart and the rest of his body has been replaced or covered by mechanical armour.
The Tin Man appears in Once Upon a Time. In this show, he started out as a woodcutter named Stanum (portrayed by Austin Obiajunwa as a young man and by Alex Désert as an adult) who encountered a younger Zelena when she saved a bird's nest. When two bullies show up to harm Zelena, Stanum helped to fend them off. Years later, Stanum comes to Zelena for help. He tells Zelena that he is slowly turning to tin after he was cursed by the Wicked Witch of the North for cutting down a tree in her area. Stanum states that the Crimson Heart artifact might be able to help him, but needs Zelena's help to get by the beast that guards it. When close to its location, Stanum is attacked by a lion who is then fended off by Zelena. When they get to the heart, Zelena picks it up and felt some of her magic draining. When Zelena claims that Dorothy Gale put Stanum up to this task, Stanum commented that he never met Dorothy. He also stated that Zelena once claimed on the day they met that she would be happy being a normal human. As Stanum fully turns to tin and is unable to move, Zelena takes the box containing the Crystal Heart and leaves while telling Stanum that perhaps Dorothy will meet Stanum and free him.

text: Modern works[edit]

text: This article gives self-sourcing examples without describing their significance in the context of the article. Please help improve this article by adding citations to reliable sources that describe the examples' significance, and by removing less pertinent examples. Unsourced or poorly sourced material may be challenged or removed. (November 2017) (Learn how and when to remove this template message)

text:
The song "Country Robot/A Letter to Dorothy" by The Incredible Moses Leroy is written from the Tin Man's perspective; it includes the lyrics "You gave me oil, I was a rusty load/ You even helped me find my heart."
In the song "Tin Man" by the band America, the lyrics state that "Oz never did give nothin' to the Tin Man, that he didn't, didn't already have." The rest of the song has nothing to do with the Tin Man or Oz.
Country artist Kenny Chesney recorded the song "Tin Man" for his album "All I Need to Know". The first verse and refrain state:
Tracy Chapman included a song titled "Remember the Tinman" on her 1995 album New Beginning.
In the VeggieTales episode The Wonderful Wizard of Ha's, the Tin Man and his Kansas counterpart from the 1939 film were played by Larry the Cucumber.
In the 2007 Sci-Fi miniseries Tin Man, a "Tin Man" is a term used for the law enforcers of Central City in the Outer Zone (O.Z.) One of the story's protagonists, Wyatt Cain (played by Neal McDonough in the title role), is a Tin Man whose past left him hardened and distant from others. In addition, he is first found by Dorothy imprisoned in an iron suit that replays a non-stop loop of the capture of his wife and child.
The Avett Brothers 2009 Album I and Love and You features a song called "Tin Man".
Verses of the Future Islands 2010 post-pop, synth-ballad Tin Man contain numerous metaphorical, Tin-Man related references. The song also features a powerful and climactic end chorus consisting solely of the repeated line - "I am the Tin Man".
In the 2011 direct-to-DVD animated film Tom and Jerry and the Wizard of Oz, the Tin Man was voiced by Rob Paulsen.
The Tin Man appears in Dorothy and the Witches of Oz played by Jordan Turnage. He appears in the form of a man named Nick (played by Billy Boyd).
A 1990 episode of Star Trek: The Next Generation is titled "Tin Man."
The Phineas & Ferb episode "Wizard of Odd" features the Tin Man in his rusted state, but he is never freed from this condition. He is also featured in an end credits song entitled "Rusted."
Mickey Mouse Clubhouse did a parody special entitled "The Wizard of Dizz," in which the role of the Tin Man is played by Mickey Mouse.
The parody The Muppets' Wizard of Oz featured Gonzo the Great in the role of the Tin Man.
In the game Code Name: S.T.E.A.M., Tin Man, along with other Oz characters, is a playable character. His design is more based on Japanese culture and he have the ability to give steam to allies.
The Tin Woodman appears as a major antagonist in Danielle Paige's Dorothy Must Die novel series. In this series, Dorothy and her friends have been corrupted by Dorothy's use of magic and the 'magic' in the gifts they received from the Wizard, with the Tin Woodman now driven by a twisted 'love' for Dorothy that is nevertheless unrequited. He is described as possessing a more twisted appearance, with his legs compared to horses' legs and his hands possessing knives for fingers. At the conclusion of the first novel, series protagonist Amy Gumm cuts out his heart, having been informed by the Wizard that she must take the gifts of Dorothy's companions to kill Dorothy herself.

text: Sources of the Tin Man image[edit]

text: Economics and history professors have published scholarly studies that indicate the images and characters used by Baum and Denslow closely resembled political images that were well known in the 1890s.[14] They state that Baum and Denslow did not simply invent the Lion, Tin Woodman, Scarecrow, Yellow Brick Road, Silver Slippers, cyclone, monkeys, Emerald City, little people, Uncle Henry, passenger balloons, witches and the wizard. These were all common themes in the editorial cartoons of the previous decade. The notion of a "Tin Man" has deep roots in European and American history, according to Green (2006), and often appeared in cartoons of the 1880s and 1890s.[15] Baum and Denslow, like most writers and illustrators, used the materials at hand that they knew best. They built a story around them, added Dorothy, and added a series of lessons to the effect that everyone possesses the resources they need (such as brains, a heart and courage) if only they had self-confidence. The Wonderful Wizard of Oz was a children’s book, of course, but as Baum warned in the preface, it was a "modernized" fairy tale as well.

text: The Tin Man—the human turned into a machine—was a common feature in political cartoons and in advertisements in the 1890s. Indeed, he had been part of European folk art for 300 years. In political interpretations of The Wonderful Wizard of Oz, the Tin Woodman is supposedly described as a worker, dehumanized by industrialization. The Tin Woodman little by little lost his natural body and had it replaced by metal; so he has lost his heart and cannot move without the help of farmers (represented by the Scarecrow); in reality he has a strong sense of cooperation and love, which needs only an infusion of self-confidence to be awakened. In the 1890s many argued that to secure a political revolution a coalition of Farmers and Workers was needed.[16]

text: The 1890 editorial cartoon to the right shows President Benjamin Harrison wearing improvised tin armor because he wanted a tariff on tin. Such images support the argument that the figure of a "tin man" was in use as political allegory in the 1890s. The man on the right is politician James G. Blaine.

text: The oil needed by the Tin Woodman had a political dimension at the time because Rockefeller's Standard Oil Company stood accused of being a monopoly (and in fact was later found guilty by the Supreme Court). In the 1902 stage adaptation, which is full of topical references that do not appear either in the novel or in any of the film adaptations (unless they are satirical), the Tin Woodman wonders what he would do if he ran out of oil. "You wouldn't be as badly off as John D. Rockefeller," the Scarecrow responds, "He'd lose six thousand dollars a minute if that happened."[17]


document_title: Running of the Bulls

question_text: when does the running of the bulls start

root

text: Running of the Bulls

text: Pamplona bull run[edit]

text: The Pamplona[2] encierro is the most popular in Spain and has been broadcast live by RTVE, the public Spanish national television channel, for over 30 years.[6] It is the highest profile event of the San Fermin festival, which is held every year from 6–14 July.[2] The first bull running is on 7 July, followed by one on each of the following mornings of the festival, beginning every day at 8 am. Among the rules to take part in the event are that participants must be at least 18 years old, run in the same direction as the bulls, not incite the bulls, and not be under the influence of alcohol.[7][8]

tag: p

text: Fence[edit]

text: In Pamplona, a set of wooden fences are erected to direct the bulls along the route and to block off side streets. A double wooden fence is used in those areas where there is enough space, while in other parts the buildings of the street act as barriers. The gaps in the barricades are wide enough for a human to slip through but narrow enough to block a bull. The fence is composed of approximately three thousand separate pieces of wood. Some parts of the fence remain in place for the duration of the fiesta, while others are placed and removed each morning.[9] Spectators can only stand behind the second fence, whereas the space between the two fences is reserved for security and medical personnel and also to participants who need cover during the event.[8]

text: Preliminaries[edit]

text: The encierro begins with runners singing a benediction. It is sung three times, each time being sung both in Spanish and Basque. The benediction is a prayer given at a statue of Saint Fermin, patron of the festival and the city, to ask the saint's protection and can be translated into English as "We ask Saint Fermin, as our Patron, to guide us through the encierro and give us his blessing". The singers finish by shouting "Viva San Fermín!, Gora San Fermin!" ("Long live Saint Fermin", in Spanish and Basque).[7] Most runners dress in the traditional clothing of the festival which consists of a white shirt and trousers with a red waistband ("faja") and neckerchief ("pañuelo"). Also some of them hold the day's newspaper rolled to draw the bulls' attention from them if necessary.[7]

text: The running[edit]

text: A first rocket is set off at 8 a.m. to alert the runners that the corral gate is open. A second rocket signals that all six bulls have been released. The third and fourth rockets are signals that all of the herd has entered the bullring and its corral respectively, marking the end of the event.[7] The average duration between the first rocket and the end of the encierro is two minutes, 30 seconds.[7]

text: The encierro is usually composed of the six bulls to be fought in the afternoon, six steers that run in herd with the bulls, and three more steers that follow the herd to encourage any reluctant bulls to continue along the route. The function of the steers, who run the route daily, is to guide the bulls to the bullring.[7] The average speed of the herd is 24 km/h (15 mph).[7]

text: The length of the run is 875 meters (957 yards). It goes through four streets of the old part of the city (Santo Domingo, Ayuntamiento, Mercaderes and Estafeta) via the Town Hall Square and the short section "Telefónica" (named for the location of the old telephone office at end of Calle Estafeta) just before entering into the bullring through its callejón (tunnel).[2] The fastest part of the route is up Santo Domingo and across the Town Hall Square, but the bulls often became separated at the entrance to Estafeta Street as they slowed down. One or more would slip going into the turn at Estafeta ("la curva"), resulting in the installation of anti-slip surfacing, and now most of the bulls negotiate the turn onto Estafeta and are often ahead of the steers. This has resulted in a quicker run. Runners are not permitted in the first 50 meters of the encierro, which is an uphill grade where the bulls are much faster.[citation needed]

text: Injuries, fatalities and medical attention[edit]

text: Every year, between 50 and 100 people are injured during the run.[7] Not all of the injuries require taking the patients to the hospital: in 2013, 50 people were taken by ambulance to Pamplona's hospital, with this number nearly doubling that of 2012.[10]

text: Goring is much less common but potentially life threatening. In 2013, for example, six participants were gored along the festival, in 2012, only four runners were injured by the horns of the bulls with exactly the same number of gored people in 2011, nine in 2010 and 10 in 2009; with one of the latter killed.[10][11] As most of the runners are male, only 5 women have been gored since 1974. Before that date, running was prohibited for women.[12]

text: Another major risk is runners falling and piling up (a "montón") at the entrance of the bullring, which acts as a funnel as it is much narrower than the previous street. In such cases injuries come both from asphyxia and contusions to those in the pile and from goring if the bulls crush into the pile. This kind of blocking of the entrance has occurred at least ten times in the history of the run, the last occurring in 2013 and the first dating back to 1878. A runner died of suffocation in one such pile up in 1977.[13]

text: Overall, since record-keeping began in 1910, 15 people have been killed in the bull running of Pamplona, most of them due to being gored.[7] To minimize the impact of injuries every day 200 people collaborate in the medical attention. They are deployed in 16 sanitary posts (every 50 metres on average), each one with at least a physician and a nurse among their personnel. Most of these 200 people are volunteers, mainly from the Red Cross. In addition to the medical posts, there are around 20 ambulances. This organization makes it possible to have a gored person stabilized and taken to a hospital in less than 10 minutes.[14]

text:
15 Deaths since 1910 in the bull run of Pamplona[7]

Year
Name
Age
Origin
Location
Cause of death

1924
Esteban Domeño
22
Navarre, Spain
Telefónica
Goring[15]

1927
Santiago Zufía
34
Navarre, Spain
Bullring
Goring[15]

1935
Gonzalo Bustinduy
29
San Luis Potosí, Mexico
Bullring
Goring[15]

1947
Casimiro Heredia
37
Navarre, Spain
Estafeta
Goring[15]

1947
Julián Zabalza
23
Navarre, Spain
Bullring
Goring[15]

1961
Vicente Urrizola
32
Navarre, Spain
Santo Domingo
Goring[15]

1969
Hilario Pardo
45
Navarre, Spain
Santo Domingo
Goring[15]

1974
Juan Ignacio Eraso
18
Navarre, Spain
Telefónica
Goring[15]

1975
Gregorio Gorriz
41
Navarre, Spain
Bullring
Goring[15]

1977
José Joaquín Esparza
17
Navarre, Spain
Bullring
Suffocated in a pile-up.[7]

1980
José Antonio Sánchez
26
Navarre, Spain
Town Hall Square
Goring[15]

1980
Vicente Risco
29
Badajoz, Spain
Bullring
hit[15]

1995
Matthew Peter Tassio
22
Glen Ellyn, Illinois, USA
Town Hall Square
Goring[16]

2003
Fermín Etxeberria
62
Navarre, Spain
Mercaderes
Hit by a horn[17]

2009
Daniel Jimeno Romero
27
Alcalá de Henares, Spain
Telefónica
Goring[18][19]

tag: table

text: Dress code[edit]

text: Though there is no formal dress code, the very common and traditional attire is white pants, white shirt with a red scarf around the waist and a red handkerchief around the neck. Another common dress practice, seen as a risk by some but as a daring depiction of courage by others is dressing in a conspicuous manner. Many runners that want to be perceived as daring wear colors other than white, a common alternate color choice is blue. Blue is thought by some to draw the bulls' attention.[citation needed] Others include large logos on their shirt to capture the attention of the bulls. In the age of social media explosion, this is also thought to be a way to highlight someone in a photo.[20]

text: Media[edit]

text: The encierro of Pamplona has been depicted many times in literature, television or advertising, but became known worldwide partly because of the descriptions of Ernest Hemingway in books The Sun Also Rises and Death in the Afternoon. The cinema pioneer Louis Lumière filmed the run in 1899.[21]

text: The event is the basis for a chapter in James Michener's 1971 novel The Drifters.

text: The run is depicted in the 1991 Billy Crystal film City Slickers, where the character "Mitch" (Crystal) is gored (non-fatally) from behind by a bull during a vacation with the other main characters.

text: The run appears in the 2011 Bollywood movie Zindagi Na Milegi Dobara, directed by Zoya Akhtar, as the final dare in the bucket list of the three bachelors who have to overcome their ultimate fear; death. At first, the trio run part of the route. They stop at the square, but then recover their nerve, and continue to the end. The completion of the run depicts their freedom as they learn that surviving a mortal danger can bring joy.

text: Running with Bulls, a 2012 documentary of the festival filmed by Construct Creatives and presented by Jason Farrel, depicts the pros and cons of the controversial tradition.[22]

text: Since 2014, the Esquire Channel has broadcast the running of the bulls as a show in the US,[23] with both live commentary and then a recorded 'round up' later in the day by NBCSN commentators the Men in Blazers, including interviews with noted participants such as Madrid-born runner David Ubeda,[24] former US Special Forces soldier turned filmmaker Dennis Clancey,[25] the historic New York-born runner Joe Distler[26] and former British bullfighter and author Alexander Fiske-Harrison.[27]

text: In 2014, the eBook guide, Fiesta: How To Survive The Bulls Of Pamplona, caused headlines around the world when one of the contributors was gored by a bull soon after its publication.[28] (See Further Reading section below.)

text: Other examples[edit]

text: Although the most famous running of the bulls is that of San Fermín,[2] they are held in towns and villages across Spain, Portugal, and in some cities in southern France during the summer. Examples are the bull run of San Sebastián de los Reyes, near Madrid, at the end of August which is the most popular of Spain after Pamplona, the bull run of Cuéllar, considered as the oldest of Spain since there are documents of its existence dating back to 1215, the Highland Capeias of the Raia in Sabugal, Portugal, with horses leading the herd crossing old border passes out of Spain and using the medieval 'Forcåo', or the bull run of Navalcarnero held at night.

text: Other encierros have also caused fatalities.[29]

text: Bous al carrer[edit]

text: Bous al carrer, correbou or correbous (meaning in Catalan, bulls in the street) is a typical festivity in many villages in the Valencian region, Terres de l'Ebre, Catalonia and Fornalutx, Mallorca. Another similar tradition is soltes de vaques, where cows are used instead of bulls. Even though they can take place all along the year, they are most usual during local festivals (normally in August). Compared to encierros, animals are not directed to any bullring.

text: These festivities are normally organized by the youngsters of the village, as a way for showing their courage and ability with the bull. Some sources consider this tradition a masculine initiation rite to adulthood.[30]

text: Occitan area of France[edit]

text: Numerous bull running events happen in France in the region around Sommières, in accordance with the Camargues tradition, in which no bull gets hurt. For instance in Calvisson, the annual event takes place around 20 July over a period of five days. There are four events: the Abrivado where over ten bulls are run together through the street guided by a group of twelve 'gardians' mounted on white Camargues horses, an Encierro where one bull is released outside the foyer and finds his own way back to the pen, the Bandido where one bull is run accompanied through the streets, and the Bandido de nuit which is the same thing but after dark. Boys and men run with the bulls and try and separate them from the horses, stop them, and physically turn them away from the horses. [31]

text: Stamford Bull Run[edit]

text: The English town of Stamford, Lincolnshire was host to the Stamford Bull Run for almost 700 years until it was abandoned in 1837.[32] According to local tradition, the custom dated from the time of King John when William de Warenne, 5th Earl of Surrey, saw two bulls fighting in the meadow beneath. Some butchers came to part the combatants and one of the bulls ran into the town, causing a great uproar. The earl, mounting his horse, rode after the animal, and enjoyed the sport so much, that he gave the meadow in which the fight began, to the butchers of Stamford, on condition that they should provide a bull, to be run in the town every 13 November, for ever after. As of 2013 the bull run had been revived as a ceremonial, festival-style community event.

text: Mock bull runs[edit]

text: A variation is the nightly "fire bull" where balls of flammable material are placed on the horns. Currently the bull is often replaced by a runner carrying a frame on which fireworks are placed and dodgers, usually children, run to avoid the sparks.

text: In 2008, Red Bull Racing driver David Coulthard and Scuderia Toro Rosso driver Sébastien Bourdais performed a version of a 'bull running' event in Pamplona, Spain, with the Formula One cars chasing 500 runners through the actual Pamplona route.[33]

text: The Big Easy Rollergirls roller derby team has performed a version of annual bull run in New Orleans, Louisiana since 2007. The team, dressed as bulls, skates after runners through the French Quarter. In 2012, there were 14,000 runners and over 400 "bulls" from all over the country, with huge before- and after-parties.[34][35][36]

text: In Ballyjamesduff, Ireland, an annual "Pig Run" is held with small pigs. It looks just like mini-encierro but with pigs instead of bulls.

text: In Dewey Beach, Delaware, the Starboard bar[37] sponsors an annual Running of the Bull  [sic], in which hundreds of red and white-clad beachgoers are chased down the shore by a single "bull" (two people in a costume).

text: In Rangiora, New Zealand, an annual "Running of the Sheep" is held, in which 1000–2000 sheep are released down the main street of the small farming town.

text: The Running of the Bulls UK is a pub crawl event that takes place on London's Hampstead Heath and uses fast runners in place of bulls.

text: In 2014, Pamplona inaugurated a series of running events in June, the San Fermin Marathon, of a full marathon (42.195 km), half marathon (21.097 km), or 10 km road race that concludes with the final 900m of each race using the encierro route, runners crossing the finish line inside the bullring.[38]

text: Opposition[edit]

text: Many opponents argue that bulls are mentally injured by the harassment and voicing of both participants and spectators, and some of animals may also die because of the stress, especially if they are roped or bring flares in their horns (bou embolat version).[39] Despite all this, the festivities seem to have wide popular support in their villages[40]

text: Many animal rights activists oppose the event. PETA activists created the "running of the nudes", a demonstration done two days before the beginning of San Fermín in Pamplona. By marching naked, they protested the festival and the following bullfight, arguing the bulls are tortured for entertainment.[41]

text: The city of San Miguel de Allende, Mexico, cancelled its Sanmiguelada running of the bulls after 2006, citing public disorder associated with the event.[42] After the event was cancelled in San Miguel, the city of Salvatierra, also in the state of Guanajuato, picked up the event. It is now called La Marquesada and the three-day event is held during the last weekend of the month of September or first weekend of October.

text: Further reading[edit]

text:
Alexander Fiske-Harrison, ed. (2016). Fiesta: How To Survive The Bulls Of Pamplona (3 ed.). Mephisto Press.
Bill Hillmann (2015). Mozos: A Decade Running with the Bulls of Spain. Chicago, Illinois: Curbside Splendor Publishing. ISBN 978-1-9404-3053-9.

tag: ul


document_title: Types of volcanic eruptions

question_text: where do volcanic eruptions generally occur give one example

text: Types of volcanic eruptions

text: Eruption mechanisms[edit]

text: Volcanic eruptions arise through three main mechanisms:[1]

text:
Gas release under decompression causing magmatic eruptions
Thermal contraction from chilling on contact with water causing phreatomagmatic eruptions
Ejection of entrained particles during steam eruptions causing phreatic eruptions

text: There are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra.[1] Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption.[2]

text: Volcanic eruptions vary widely in strength. On the one extreme there are effusive Hawaiian eruptions, which are characterized by lava fountains and fluid lava flows, which are typically not very dangerous. On the other extreme, Plinian eruptions are large, violent, and highly dangerous explosive events. Volcanoes are not bound to one eruptive style, and frequently display many different types, both passive and explosive, even in the span of a single eruptive cycle.[3] Volcanoes do not always erupt vertically from a single crater near their peak, either. Some volcanoes exhibit lateral and fissure eruptions. Notably, many Hawaiian eruptions start from rift zones,[4] and some of the strongest Surtseyan eruptions develop along fracture zones.[5] Scientists believed that pulses of magma mixed together in the chamber before climbing upward—a process estimated to take several thousands of years. But Columbia University volcanologists found that the eruption of Costa Rica’s Irazú Volcano in 1963 was likely triggered by magma that took a nonstop route from the mantle over just a few months.[6]

text: Volcanic explosivity index[edit]

text: The volcanic explosivity index (commonly shortened to VEI) is a scale, from 0 to 8, for measuring the strength of eruptions. It is used by the Smithsonian Institution's Global Volcanism Program in assessing the impact of historic and prehistoric lava flows. It operates in a way similar to the Richter scale for earthquakes, in that each interval in value represents a tenfold increasing in magnitude (it is logarithmic).[7] The vast majority of volcanic eruptions are of VEIs between 0 and 2.[3]

text: Volcanic eruptions by VEI index[7]

text:
VEI
Plume height
Eruptive volume *
Eruption type
Frequency **
Example

0
<100 m (330 ft)
1,000 m3 (35,300 cu ft)
Hawaiian
Continuous
Kilauea

1
100–1,000 m (300–3,300 ft)
10,000 m3 (353,000 cu ft)
Hawaiian/Strombolian
Fortnightly
Stromboli

2
1–5 km (1–3 mi)
1,000,000 m3 (35,300,000 cu ft) †
Strombolian/Vulcanian
Monthly
Galeras (1992)

3
3–15 km (2–9 mi)
10,000,000 m3 (353,000,000 cu ft)
Vulcanian
3 monthly
Nevado del Ruiz (1985)

4
10–25 km (6–16 mi)
100,000,000 m3 (0.024 cu mi)
Vulcanian/Peléan
18 months
Eyjafjallajökull (2010)

5
>25 km (16 mi)
1 km3 (0.24 cu mi)
Plinian
10–15 years
Mount St. Helens (1980)

6
>25 km (16 mi)
10 km3 (2 cu mi)
Plinian/Ultra-Plinian
50–100 years
Santa Maria (1902)

7
>25 km (16 mi)
100 km3 (20 cu mi)
Ultra-Plinian
500–1000 years
Tambora (1815)

8
>25 km (16 mi)
1,000 km3 (200 cu mi)
Supervolcanic
50,000+ years[8][9]
Lake Toba (74 k.y.a.)

 * This is the minimum eruptive volume necessary for the eruption to be considered within the category.
 ** Values are a rough estimate. They indicate the frequencies for volcanoes of that magnitude OR HIGHER
 † There is a discontinuity between the 1st and 2nd VEI level; instead of increasing by a magnitude of 10, the value increases by a magnitude of 100 (from 10,000 to 1,000,000).

text: Magmatic eruptions[edit]

text: Magmatic eruptions produce juvenile clasts during explosive decompression from gas release. They range in intensity from the relatively small lava fountains on Hawaii to catastrophic Ultra-Plinian eruption columns more than 30 km (19 mi) high, bigger than the eruption of Mount Vesuvius in 79 that buried Pompeii.[1]

text: Hawaiian[edit]

text: Hawaiian eruptions are a type of volcanic eruption, named after the Hawaiian volcanoes with which this eruptive type is hallmark. Hawaiian eruptions are the calmest types of volcanic events, characterized by the effusive eruption of very fluid basalt-type lavas with low gaseous content. The volume of ejected material from Hawaiian eruptions is less than half of that found in other eruptive types. Steady production of small amounts of lava builds up the large, broad form of a shield volcano. Eruptions are not centralized at the main summit as with other volcanic types, and often occur at vents around the summit and from fissure vents radiating out of the center.[4]

text: Hawaiian eruptions often begin as a line of vent eruptions along a fissure vent, a so-called "curtain of fire." These die down as the lava begins to concentrate at a few of the vents. Central-vent eruptions, meanwhile, often take the form of large lava fountains (both continuous and sporadic), which can reach heights of hundreds of meters or more. The particles from lava fountains usually cool in the air before hitting the ground, resulting in the accumulation of cindery scoria fragments; however, when the air is especially thick with clasts, they cannot cool off fast enough due to the surrounding heat, and hit the ground still hot, the accumulation of which forms spatter cones. If eruptive rates are high enough, they may even form splatter-fed lava flows. Hawaiian eruptions are often extremely long lived; Puʻu ʻŌʻō, a cinder cone of Kilauea, has been erupting continuously since 1983. Another Hawaiian volcanic feature is the formation of active lava lakes, self-maintaining pools of raw lava with a thin crust of semi-cooled rock; there are currently only 5 such lakes in the world, and the one at Kīlauea's Kupaianaha vent is one of them.[4]

text: Flows from Hawaiian eruptions are basaltic, and can be divided into two types by their structural characteristics. Pahoehoe lava is a relatively smooth lava flow that can be billowy or ropey. They can move as one sheet, by the advancement of "toes," or as a snaking lava column. A'a lava flows are denser and more viscous than pahoehoe, and tend to move slower. Flows can measure 2 to 20 m (7 to 66 ft) thick. A'a flows are so thick that the outside layers cools into a rubble-like mass, insulating the still-hot interior and preventing it from cooling. A'a lava moves in a peculiar way—the front of the flow steepens due to pressure from behind until it breaks off, after which the general mass behind it moves forward. Pahoehoe lava can sometimes become A'a lava due to increasing viscosity or increasing rate of shear, but A'a lava never turns into pahoehoe flow.[10]

text: Hawaiian eruptions are responsible for several unique volcanological objects. Small volcanic particles are carried and formed by the wind, chilling quickly into teardrop-shaped glassy fragments known as Pele's tears (after Pele, the Hawaiian volcano deity). During especially high winds these chunks may even take the form of long drawn-out strands, known as Pele's hair. Sometimes basalt aerates into reticulite, the lowest density rock type on earth.[4]

text: Although Hawaiian eruptions are named after the volcanoes of Hawaii, they are not necessarily restricted to them; the largest lava fountain ever recorded formed on the island of Izu Ōshima (on Mount Mihara) in 1986, a 1,600 m (5,249 ft) gusher that was more than twice as high as the mountain itself (which stands at 764 m (2,507 ft)).[4][11]

text: Volcanoes known to have Hawaiian activity include:

text:
Puʻu ʻŌʻō, a parasitic cinder cone located on Kilauea on the island of Hawaiʻi which has been erupting continuously since 1983. The eruptions began with a 6 km (4 mi)-long fissure-based "curtain of fire" on 3 January. These gave way to centralized eruptions on the site of Kilauea's east rift, eventually building up the still active cone.[4]
For a list of all of the volcanoes of Hawaii, see List of volcanoes in the Hawaiian – Emperor seamount chain.
Mount Etna, Italy.[4]
Mount Mihara in 1986 (see above paragraph)[4]

text: Strombolian[edit]

text: Strombolian eruptions are a type of volcanic eruption, named after the volcano Stromboli, which has been erupting continuously for centuries.[12] Strombolian eruptions are driven by the bursting of gas bubbles within the magma. These gas bubbles within the magma accumulate and coalesce into large bubbles, called gas slugs. These grow large enough to rise through the lava column.[13] Upon reaching the surface, the difference in air pressure causes the bubble to burst with a loud pop,[12] throwing magma in the air in a way similar to a soap bubble. Because of the high gas pressures associated with the lavas, continued activity is generally in the form of episodic explosive eruptions accompanied by the distinctive loud blasts.[12] During eruptions, these blasts occur as often as every few minutes.[14]

text: The term "Strombolian" has been used indiscriminately to describe a wide variety of volcanic eruptions, varying from small volcanic blasts to large eruptive columns. In reality, true Strombolian eruptions are characterized by short-lived and explosive eruptions of lavas with intermediate viscosity, often ejected high into the air. Columns can measure hundreds of meters in height. The lavas formed by Strombolian eruptions are a form of relatively viscous basaltic lava, and its end product is mostly scoria.[12] The relative passivity of Strombolian eruptions, and its non-damaging nature to its source vent allow Strombolian eruptions to continue unabated for thousands of years, and also makes it one of the least dangerous eruptive types.[14]

text: Strombolian eruptions eject volcanic bombs and lapilli fragments that travel in parabolic paths before landing around their source vent. The steady accumulation of small fragments builds cinder cones composed completely of basaltic pyroclasts. This form of accumulation tends to result in well-ordered rings of tephra.[12]

text: Strombolian eruptions are similar to Hawaiian eruptions, but there are differences. Strombolian eruptions are noisier, produce no sustained eruptive columns, do not produce some volcanic products associated with Hawaiian volcanism (specifically Pele's tears and Pele's hair), and produce fewer molten lava flows (although the eruptive material does tend to form small rivulets).[12][14]

text: Volcanoes known to have Strombolian activity include:

text:
Parícutin, Mexico, which erupted from a fissure in a cornfield in 1943. Two years into its life, pyroclastic activity began to wane, and the outpouring of lava from its base became its primary mode of activity. Eruptions ceased in 1952, and the final height was 424 m (1,391 ft). This was the first time that scientists are able to observe the complete life cycle of a volcano.[12]
Mount Etna, Italy, which has displayed Strombolian activity in recent eruptions, for example in 1981, 1999,[15] 2002–2003, and 2009.[16]
Mount Erebus in Antarctica, the southernmost active volcano in the world, having been observed erupting since 1972.[17] Eruptive activity at Erebus consists of frequent Strombolian activity.[18]
Stromboli itself. The namesake of the mild explosive activity that it possesses has been active throughout historical time; essentially continuous Strombolian eruptions, occasionally accompanied by lava flows, have been recorded at Stromboli for more than a millennium.[19]

text: Vulcanian[edit]

text: Vulcanian eruptions are a type of volcanic eruption, named after the volcano Vulcano.[20] It was named so following Giuseppe Mercalli's observations of its 1888–1890 eruptions.[21] In Vulcanian eruptions, intermediate viscous magma within the volcano make it difficult for vesiculate gases to escape. Similar to Strombolian eruptions, this leads to the buildup of high gas pressure, eventually popping the cap holding the magma down and resulting in an explosive eruption. However, unlike Strombolian eruptions, ejected lava fragments are not aerodynamic; this is due to the higher viscosity of Vulcanian magma and the greater incorporation of crystalline material broken off from the former cap. They are also more explosive than their Strombolian counterparts, with eruptive columns often reaching between 5 and 10 km (3 and 6 mi) high. Lastly, Vulcanian deposits are andesitic to dacitic rather than basaltic.[20]

text: Initial Vulcanian activity is characterized by a series of short-lived explosions, lasting a few minutes to a few hours and typified by the ejection of volcanic bombs and blocks. These eruptions wear down the lava dome holding the magma down, and it disintegrates, leading to much more quiet and continuous eruptions. Thus an early sign of future Vulcanian activity is lava dome growth, and its collapse generates an outpouring of pyroclastic material down the volcano's slope.[20]

text: Deposits near the source vent consist of large volcanic blocks and bombs, with so-called "bread-crust bombs" being especially common. These deeply cracked volcanic chunks form when the exterior of ejected lava cools quickly into a glassy or fine-grained shell, but the inside continues to cool and vesiculate. The center of the fragment expands, cracking the exterior. However the bulk of Vulcanian deposits are fine grained ash. The ash is only moderately dispersed, and its abundance indicates a high degree of fragmentation, the result of high gas contents within the magma. In some cases these have been found to be the result of interaction with meteoric water, suggesting that Vulcanian eruptions are partially hydrovolcanic.[20]

text: Volcanoes that have exhibited Vulcanian activity include:

text:
Sakurajima, Japan has been the site of Vulcanian activity near-continuously since 1955.[22]
Tavurvur, Papua New Guinea, one of several volcanoes in the Rabaul Caldera.[20]
Irazú Volcano in Costa Rica exhibited Vulcanian activity in its 1965 eruption.[23]

text: Peléan[edit]

text: Peléan eruptions (or nuée ardente) are a type of volcanic eruption, named after the volcano Mount Pelée in Martinique, the site of a massive Peléan eruption in 1902 that is one of the worst natural disasters in history. In Peléan eruptions, a large amount of gas, dust, ash, and lava fragments are blown out the volcano's central crater,[24] driven by the collapse of rhyolite, dacite, and andesite lava dome collapses that often create large eruptive columns. An early sign of a coming eruption is the growth of a so-called Peléan or lava spine, a bulge in the volcano's summit preempting its total collapse.[25] The material collapses upon itself, forming a fast-moving pyroclastic flow[24] (known as a block-and-ash flow)[26] that moves down the side of the mountain at tremendous speeds, often over 150 km (93 mi) per hour. These massive landslides make Peléan eruptions one of the most dangerous in the world, capable of tearing through populated areas and causing massive loss of life. The 1902 eruption of Mount Pelée caused tremendous destruction, killing more than 30,000 people and completely destroying the town of St. Pierre, the worst volcanic event in the 20th century.[24]

text: Peléan eruptions are characterized most prominently by the incandescent pyroclastic flows that they drive. The mechanics of a Peléan eruption are very similar to that of a Vulcanian eruption, except that in Peléan eruptions the volcano's structure is able to withstand more pressure, hence the eruption occurs as one large explosion rather than several smaller ones.[27]

text: Volcanoes known to have Peléan activity include:

text:
Mount Pelée, Martinique. The 1902 eruption of Mount Pelée completely devastated the island, destroying the town of St. Pierre and leaving only 3 survivors.[28] The eruption was directly preceded by lava dome growth.[20]
Mayon Volcano, the Philippines most active volcano. It has been the site of many different types of eruptions, Peléan included. Approximately 40 ravines radiate from the summit and provide pathways for frequent pyroclastic flows and mudslides to the lowlands below. Mayon's most violent eruption occurred in 1814 and was responsible for over 1200 deaths.[29]
The 1951 Peléan eruption of Mount Lamington. Prior to this eruption the peak had not even been recognized as a volcano. Over 3,000 people were killed, and it has become a benchmark for studying large Peléan eruptions.[30]

text:
Pyroclastic flows at Mayon Volcano, Philippines, 1984.

The lava spine that developed after the 1902 eruption of Mount Pelée

Mount Lamington following the devastating 1951 eruption.

text: Plinian[edit]

text: Plinian eruptions (or Vesuvian) are a type of volcanic eruption, named for the historical eruption of Mount Vesuvius in 79 AD that buried the Roman towns of Pompeii and Herculaneum and, specifically, for its chronicler Pliny the Younger.[31] The process powering Plinian eruptions starts in the magma chamber, where dissolved volatile gases are stored in the magma. The gases vesiculate and accumulate as they rise through the magma conduit. These bubbles agglutinate and once they reach a certain size (about 75% of the total volume of the magma conduit) they explode. The narrow confines of the conduit force the gases and associated magma up, forming an eruptive column. Eruption velocity is controlled by the gas contents of the column, and low-strength surface rocks commonly crack under the pressure of the eruption, forming a flared outgoing structure that pushes the gases even faster.[32]

text: These massive eruptive columns are the distinctive feature of a Plinian eruption, and reach up 2 to 45 km (1 to 28 mi) into the atmosphere. The densest part of the plume, directly above the volcano, is driven internally by gas expansion. As it reaches higher into the air the plume expands and becomes less dense, convection and thermal expansion of volcanic ash drive it even further up into the stratosphere. At the top of the plume, powerful prevailing winds drive the plume in a direction away from the volcano.[32]

text: These highly explosive eruptions are associated with volatile-rich dacitic to rhyolitic lavas, and occur most typically at stratovolcanoes. Eruptions can last anywhere from hours to days, with longer eruptions being associated with more felsic volcanoes. Although they are associated with felsic magma, Plinian eruptions can just as well occur at basaltic volcanoes, given that the magma chamber differentiates and has a structure rich in silicon dioxide.[31]

text: Plinian eruptions are similar to both Vulcanian and Strombolian eruptions, except that rather than creating discrete explosive events, Plinian eruptions form sustained eruptive columns. They are also similar to Hawaiian lava fountains in that both eruptive types produce sustained eruption columns maintained by the growth of bubbles that move up at about the same speed as the magma surrounding them.[31]

text: Regions affected by Plinian eruptions are subjected to heavy pumice airfall affecting an area 0.5 to 50 km3 (0 to 12 cu mi) in size.[31] The material in the ash plume eventually finds its way back to the ground, covering the landscape in a thick layer of many cubic kilometers of ash.[33]

text: However the most dangerous eruptive feature are the pyroclastic flows generated by material collapse, which move down the side of the mountain at extreme speeds[31] of up to 700 km (435 mi) per hour and with the ability to extend the reach of the eruption hundreds of kilometers.[33] The ejection of hot material from the volcano's summit melts snowbanks and ice deposits on the volcano, which mixes with tephra to form lahars, fast moving mudslides with the consistency of wet concrete that move at the speed of a river rapid.[31]

text: Major Plinian eruptive events include:

text:
The AD 79 eruption of Mount Vesuvius buried the Roman towns of Pompeii and Herculaneum under a layer of ash and tephra. It is the model Plinian eruption. Mount Vesuvius has erupted several times since then. Its last eruption was in 1944 and caused problems for the allied armies as they advanced through Italy.[31] It was the report by Pliny that Younger that lead scientists to refer to vesuvian eruptions as "Plinian".
The 1980 eruption of Mount St. Helens in Washington, which ripped apart the volcano's summit, was a Plinian eruption of Volcanic Explosivity Index (VEI) 5.[3]
The strongest types of eruptions, with a VEI of 8, are so-called "Ultra-Plinian" eruptions, such as the most recent one at Lake Toba 74 thousand years ago, which put out 2800 times the material erupted by Mount St. Helens in 1980.[7][34]
Hekla in Iceland, an example of basaltic Plinian volcanism being its 1947–48 eruption. The past 800 years have been a pattern of violent initial eruptions of pumice followed by prolonged extrusion of basaltic lava from the lower part of the volcano.[31]
Pinatubo in the Philippines on 15 June 1991, which produced 5 km3 (1 cu mi) of dacitic magma, a 40 km (25 mi) high eruption column, and released 17 megatons of sulfur dioxide.[35]

text: Phreatomagmatic eruptions[edit]

text: Phreatomagmatic eruptions are eruptions that arise from interactions between water and magma. They are driven from thermal contraction (as opposed to magmatic eruptions, which are driven by thermal expansion) of magma when it comes in contact with water. This temperature difference between the two causes violent water-lava interactions that make up the eruption. The products of phreatomagmatic eruptions are believed to be more regular in shape and finer grained than the products of magmatic eruptions because of the differences in eruptive mechanisms.[1][36]

text: There is debate about the exact nature of phreatomagmatic eruptions, and some scientists believe that fuel-coolant reactions may be more critical to the explosive nature than thermal contraction.[36] Fuel coolant reactions may fragment the volcanic material by propagating stress waves, widening cracks and increasing surface area that ultimately leads to rapid cooling and explosive contraction-driven eruptions.[1]

text: Surtseyan[edit]

text: A Surtseyan eruption (or hydrovolcanic) is a type of volcanic eruption caused by shallow-water interactions between water and lava, named so after its most famous example, the eruption and formation of the island of Surtsey off the coast of Iceland in 1963. Surtseyan eruptions are the "wet" equivalent of ground-based Strombolian eruptions, but because of where they are taking place they are much more explosive. This is because as water is heated by lava, it flashes in steam and expands violently, fragmenting the magma it is in contact with into fine-grained ash. Surtseyan eruptions are the hallmark of shallow-water volcanic oceanic islands, however they are not specifically confined to them. Surtseyan eruptions can happen on land as well, and are caused by rising magma that comes into contact with an aquifer (water-bearing rock formation) at shallow levels under the volcano.[5] The products of Surtseyan eruptions are generally oxidized palagonite basalts (though andesitic eruptions do occur, albeit rarely), and like Strombolian eruptions Surtseyan eruptions are generally continuous or otherwise rhythmic.[37]

text: A distinct defining feature of a Surtseyan eruption is the formation of a pyroclastic surge (or base surge), a ground hugging radial cloud that develops along with the eruption column. Base surges are caused by the gravitational collapse of a vaporous eruptive column, one that is denser overall then a regular volcanic column. The densest part of the cloud is nearest to the vent, resulting a wedge shape. Associated with these laterally moving rings are dune-shaped depositions of rock left behind by the lateral movement. These are occasionally disrupted by bomb sags, rock that was flung out by the explosive eruption and followed a ballistic path to the ground. Accumulations of wet, spherical ash known as accretionary lapilli is another common surge indicator.[5]

text: Over time Surtseyan eruptions tend to form maars, broad low-relief volcanic craters dug into the ground, and tuff rings, circular structures built of rapidly quenched lava. These structures are associated with a single vent eruption, however if eruptions arise along fracture zones a rift zone may be dug out; these eruptions tend to be more violent then the ones forming a tuff ring or maars, an example being the 1886 eruption of Mount Tarawera.[5][37] Littoral cones are another hydrovolcanic feature, generated by the explosive deposition of basaltic tephra (although they are not truly volcanic vents). They form when lava accumulates within cracks in lava, superheats and explodes in a steam explosion, breaking the rock apart and depositing it on the volcano's flank. Consecutive explosions of this type eventually generate the cone.[5]

text: Volcanoes known to have Surtseyan activity include:

text:
Surtsey, Iceland. The volcano built itself up from depth and emerged above the Atlantic Ocean off the coast of Iceland in 1963. Initial hydrovolcanics were highly explosive, but as the volcano grew out rising lava started to interact less with the water and more with the air, until finally Surtseyan activity waned and became more Strombolian in character.[5]
Ukinrek Maars in Alaska, 1977, and Capelinhos in the Azores, 1957, both examples of above-water Surtseyan activity.[5]
Mount Tarawera in New Zealand erupted along a rift zone in 1886, killing 150 people.[5]
Ferdinandea, a seamount in the Mediterranean Sea, breached sea level in July 1831 and was the source of a dispute over sovereignty between Italy, France, and Great Britain. The volcano did not build tuff cones strongly enough to withstand erosion, and disappeared back below the waves soon after it appeared.[38]
The underwater volcano Hunga Tonga in Tonga breached sea level in 2009. Both of its vents exhibited Surtseyan activity for much of the time. It was also the site of an earlier eruption in May 1988.[39]

text:
Surtsey, erupting 13 days after breaching the water. A tuff ring surrounds the vent.

The fissure formed by the 1886 eruption of Mount Tarawera, an example of a fracture zone eruption.

text: Submarine[edit]

text: Submarine eruptions are a type of volcanic eruption that occurs underwater. An estimated 75% of the total volcanic eruptive volume is generated by submarine eruptions near mid ocean ridges alone, however because of the problems associated with detecting deep sea volcanics, they remained virtually unknown until advances in the 1990s made it possible to observe them.[40]

text: Submarine eruptions may produce seamounts which may break the surface to form volcanic islands and island chains.

text: Submarine volcanism is driven by various processes. Volcanoes near plate boundaries and mid-ocean ridges are built by the decompression melting of mantle rock that rises on an upwelling portion of a convection cell to the crustal surface. Eruptions associated with subducting zones, meanwhile, are driven by subducting plates that add volatiles to the rising plate, lowering its melting point. Each process generates different rock; mid-ocean ridge volcanics are primarily basaltic, whereas subduction flows are mostly calc-alkaline, and more explosive and viscous.[41]

text: Spreading rates along mid-ocean ridges vary widely, from 2 cm (0.8 in) per year at the Mid-Atlantic Ridge, to up to 16 cm (6 in) along the East Pacific Rise. Higher spreading rates are a probably cause for higher levels of volcanism. The technology for studying seamount eruptions did not exist until advancements in hydrophone technology made it possible to "listen" to acoustic waves, known as T-waves, released by submarine earthquakes associated with submarine volcanic eruptions. The reason for this is that land-based seismometers cannot detect sea-based earthquakes below a magnitude of 4, but acoustic waves travel well in water and long periods of time. A system in the North Pacific, maintained by the United States Navy and originally intended for the detection of submarines, has detected an event on average every 2 to 3 years.[40]

text: The most common underwater flow is pillow lava, a circular lava flow named after its unusual shape. Less common are glassy, marginal sheet flows, indicative of larger-scale flows. Volcaniclastic sedimentary rocks are common in shallow-water environments. As plate movement starts to carry the volcanoes away from their eruptive source, eruption rates start to die down, and water erosion grinds the volcano down. The final stages of eruption caps the seamount in alkalic flows.[41] There are about 100,000 deepwater volcanoes in the world,[42] although most are beyond the active stage of their life.[41] Some exemplary seamounts are Loihi Seamount, Bowie Seamount, Davidson Seamount, and Axial Seamount.

text: Subglacial[edit]

text: Subglacial eruptions are a type of volcanic eruption characterized by interactions between lava and ice, often under a glacier. The nature of glaciovolcanism dictates that it occurs at areas of high latitude and high altitude.[43] It has been suggested that subglacial volcanoes that are not actively erupting often dump heat into the ice covering them, producing meltwater.[44] This meltwater mix means that subglacial eruptions often generate dangerous jökulhlaups (floods) and lahars.[43]

text: The study of glaciovolcanism is still a relatively new field. Early accounts described the unusual flat-topped steep-sided volcanoes (called tuyas) in Iceland that were suggested to have formed from eruptions below ice. The first English-language paper on the subject was published in 1947 by William Henry Mathews, describing the Tuya Butte field in northwest British Columbia, Canada. The eruptive process that builds these structures, originally inferred in the paper,[43] begins with volcanic growth below the glacier. At first the eruptions resemble those that occur in the deep sea, forming piles of pillow lava at the base of the volcanic structure. Some of the lava shatters when it comes in contact with the cold ice, forming a glassy breccia called hyaloclastite. After a while the ice finally melts into a lake, and the more explosive eruptions of Surtseyan activity begins, building up flanks made up of mostly hyaloclastite. Eventually the lake boils off from continued volcanism, and the lava flows become more effusive and thicken as the lava cools much more slowly, often forming columnar jointing. Well-preserved tuyas show all of these stages, for example Hjorleifshofdi in Iceland.[45]

text: Products of volcano-ice interactions stand as various structures, whose shape is dependent on complex eruptive and environmental interactions. Glacial volcanism is a good indicator of past ice distribution, making it an important climatic marker. Since they are imbedded in ice, as ice retracts worldwide there are concerns that tuyas and other structures may destabalize, resulting in mass landslides. Evidence of volcanic-glacial interactions are evident in Iceland and parts of British Columbia, and it is even possible that they play a role in deglaciation.[43]

text: Glaciovolcanic products have been identified in Iceland, the Canadian province of British Columbia, the U.S. states of Hawaii and Alaska, the Cascade Range of western North America, South America and even on the planet Mars.[43] Volcanoes known to have subglacial activity include:

text:
Mauna Kea in tropical Hawaii. There is evidence of past subglacial eruptive activity on the volcano in the form of a subglacial deposit on its summit. The eruptions originated about 10,000 years ago, during the last ice age, when the summit of Mauna Kea was covered in ice.[46]
In 2008, the British Antarctic Survey reported a volcanic eruption under the Antarctica ice sheet 2,200 years ago. It is believed to be that this was the biggest eruption in Antarctica in the last 10,000 years. Volcanic ash deposits from the volcano were identified through an airborne radar survey, buried under later snowfalls in the Hudson Mountains, close to Pine Island Glacier.[44]
Iceland, well known for both glaciers and volcanoes, is often a site of subglacial eruptions. An example an eruption under the Vatnajökull ice cap in 1996, which occurred under an estimated 2,500 ft (762 m) of ice.[47]
As part of the search for life on Mars, scientists have suggested that there may be subglacial volcanoes on the red planet. Several potential sites of such volcanism have been reviewed, and compared extensively with similar features in Iceland:[48]

text: Viable microbial communities have been found living in deep (−2800 m) geothermal groundwater at 349 K and pressures >300 bar. Furthermore, microbes have been postulated to exist in basaltic rocks in rinds of altered volcanic glass. All of these conditions could exist in polar regions of Mars today where subglacial volcanism has occurred.

text: Phreatic eruptions[edit]

text: Phreatic eruptions (or steam-blast eruptions) are a type of eruption driven by the expansion of steam. When cold ground or surface water come into contact with hot rock or magma it superheats and explodes, fracturing the surrounding rock[49] and thrusting out a mixture of steam, water, ash, volcanic bombs, and volcanic blocks.[50] The distinguishing feature of phreatic explosions is that they only blast out fragments of pre-existing solid rock from the volcanic conduit; no new magma is erupted.[51] Because they are driven by the cracking of rock strata under pressure, phreatic activity does not always result in an eruption; if the rock face is strong enough to withstand the explosive force, outright eruptions may not occur, although cracks in the rock will probably develop and weaken it, furthering future eruptions.[49]

text: Often a precursor of future volcanic activity,[52] phreatic eruptions are generally weak, although there have been exceptions.[51] Some phreatic events may be triggered by earthquake activity, another volcanic precursor, and they may also travel along dike lines.[49] Phreatic eruptions form base surges, lahars, avalanches, and volcanic block "rain." They may also release deadly toxic gas able to suffocate anyone in range of the eruption.[52]

text: Volcanoes known to exhibit phreatic activity include:

text:
Mount St. Helens, which exhibited phreatic activity just prior to its catastrophic 1980 eruption (which was itself Plinian).[50]
Taal Volcano, Philippines, 1965.[51]
La Soufrière of Guadeloupe (Lesser Antilles), 1975–1976 activity.[51]
Soufrière Hills volcano on Montserrat, West Indies, 1995–2012.
Poás Volcano, has frequent geyser like phreatic eruptions from its crater lake.
Mount Bulusan, well known for its sudden phreatic eruptions.
Mount Ontake, all historical eruptions of this volcano have been phreatic including the deadly 2014 eruption.


document_title: Merocrine

question_text: merocrine apocrine and holocrine are all examples of

text: Merocrine

text:
Exocrine Secretion viewtalkedit

Merocrine or eccrine – by exocytosis

Apocrine – by membrane budding (loss of cytoplasm)

Holocrine – by membrane rupture

text: Merocrine (or eccrine) is a term used to classify exocrine glands and their secretions in the study of histology. A cell is classified as merocrine if the secretions of that cell are excreted via exocytosis from secretory cells into an epithelial-walled duct or ducts and thence onto a bodily surface or into the lumen.

text: Merocrine is the most common manner of secretion. The gland releases its product and no part of the gland is lost or damaged (compare holocrine and apocrine).

text: The term eccrine is specifically used to designate merocrine secretions from sweat glands (eccrine sweat glands).[1]

text: Examples[edit]

text:
Salivary glands
Pancreatic glands
Certain sweat glands