1714: Volcano Types
Title text: It's hard living somewhere with antlions, because every time you find one of their traps, you feel compelled to spend all day constructing a tiny model of Jabba's sail barge next to it.
This comic presents a table of 12 different types of volcano. Split into 3 rows, the first 4 are authentic types of volcano; while the remaining 8 are parodies, one not even trying to represent a volcano but shows a real animal in its inverted trap cone.
Volcanoes have featured in many xkcd comics, most prominently in the left part of the world (the Lord of the Rings section) of 1608: Hoverboard. This comic's volcano looks like it could soon turn into a Somma volcano.
 Real volcanoes
- Cinder cone: small, steep-sided volcano formed of scoria and ash.
- Shield volcano: wide, rounded volcano formed of solidified lava flow.
- Stratovolcano: large volcano formed of layers (strata) from multiple eruptions.
- Somma volcano: new volcanic cone in the middle of an old collapsed volcanic crater.
 Joke volcanoes
- Metasomma volcano: nested layers of somma volcanos i.e. a whole set of new volcanoes (three in this situation) formed inside of old ones. "Meta" is a prefix that often denotes recursion. (Although this is a joke volcano, metasomma volcanoes do actually exist in real life, with one example being the Krakatoa group in Indonesia.)
- Waffle cone: type of pastry that ice cream is served in, related to volcano cones only insofar as they are the same shape, but typically the waffle cones are turned the other way up to keep the ice cream inside. If the tip of the waffle cone is not filled with solid chocolate or similar, then the contents may very well melt and run out the bottom like the smoke coming out at the very tip of the Waffle cone volcano.
- Science fair cone: common elementary science experiment that is often used as a project for science fairs. A structure is built to resemble a model volcano and is filled with a mix of baking soda, vinegar, and sometimes food coloring. The reaction between baking soda and vinegar quickly produces a large amount of carbon dioxide, creating a foam that overflows and mimics a volcanic eruption. In this picture, there are people running away from the volcano that are much smaller than it. This is likely a reference to 1611: Baking Soda and Vinegar, either the scale-model people on the first volcano, or real people running from the baking soda supervolcano (in this case two Cueball-like guys and Megan).
- Doot cone: This may likely be a reference to the meme of the skull-trumpet where the trumpet playing skull produces the sound Doot as a large part of the meme. Doot is also a fart sound; a doot cone could be just ejecting farts instead of lava.
- There has been some discussion about if this is likely, with someone referencing the DOT cones, traffic cones approved by DOT or the Department of transportation in the US.
- Also there have been mention of Dot-com coming close to Doot cone. The Dot-com bubble could be said to burst, just like this volcano bursts/erupts.
- Antlion: An antlion is the larva of an insect known as the lacewing, and is commonly called a doodlebug. These insects dig pits in the sand to use as traps; when a bug comes along and falls in, the sand collapses and falls on the bug, making it very difficult to escape. The antlion then eats the unsuspecting prey. Maybe a reference to Formica Leo, a small volcanic crater in the Reunion island named after the antlion. Also, a recurring boss villain in the video game Final Fantasy series. Also appears in the TV series as a literal black lion.
- Inverse Volcano: as the name implies, a regular volcano but reversed. A real volcano consists of solid rock on the outside, magma on the inside and spewing lava from the top.
- Ghost Vent: cone with ghosts coming out of it. It may be a reference to Scientology, where part of the faith states that the souls of aliens were stored in a volcano from which they later escaped, as described in the story of Xenu. The ghosts could also refer to the Pac-Man video game.
- Pedant's Bane: the joke is that people sometimes confuse magma and lava, which are different names for the same heated liquid rock. Magma becomes lava when it emerges from a volcano. The Pedant's Bane volcano is therefore impossible by definition, but if it were possible, then a pedant would have met his bane (i.e. his downfall), because when he corrected someone's description of this volcano, the pedant would actually be wrong. Alternatively, the illustration itself could be Pedant's Bane because a pedant would be lured into pointing out how wrong it is. This is a direct reference to the pedant in 1405: Meteor.
The title text refers to a famous scene in Star Wars: Episode VI - Return of the Jedi where Jabba the Hutt intends to feed Luke Skywalker to the sarlacc, an underground creature that builds a huge funnel trap similar to that of an antlion. Jabba's distinctive sail barge features prominently in that scene, and when Randall comes upon an antlion he can't help himself starting to build a scale model next to the antlion's inverted cone. Given how small antlions are, this will be very difficult to do, see for instance 878: Model Rail.
- [Twelve drawings in four rows of different "volcano" types, the first four real, and some not even volcanoes of any sort, real or fake. Below each panel is a caption with the name of the drawn volcano. Some of the volcanoes have labels or sound written inside the panel. Each of the volcanoes has a baseline for the ground going straight a short distance over the bottom of each panel. All 11 volcanoes lie on top of this line, but some show the inside of the volcano going further into the ground.]
- [Standard cone shaped volcano, with straight sides sloping up to a triangular shape, but with the tip of the cone cut off to form the central jagged edged crater. White smoke rises straight up and then drifts to the left forming three separate clouds.]
- Cinder Cone
- [Flat rounded shaped volcano, as a part of a circle. There is not a real crater visible but from the center a thin plume of smoke rises up, drift drifts to the left and forms a small white cloud.]
- Shield Volcano
- [This is the largest volcano. The tip of this volcano is similar to the first volcano, but with more uneven slopes and a bit smaller. The tip is clearly separated from the bottom section by a thin jagged line, and below the sides of the volcano decreases their slope, so they are less steep than the tip. Black smoke rises straight up from the crater and then drifts to the left in four thin lines.]
- [A wide volcano spans the entire panel, with a large central crater, with a bottom baseline far above the ground level. Just left of the middle of this crater is a standard smaller volcano cone, very similar to the shape of the tip in the previous panel. Even the smoke from this cones small crater is similar to the previous panels.]
- Somma Volcano
- [The central part of this volcano is the same shape as the previous panel. This could be a zoom out, revealing that the large crater, is at the center on an even larger crater, which again is at the center of a crater that spans the panel. A plume of black smoke rises from the centeral cones crater, and drifts left as five white clouds.]
- Metasomma Volcano
- [A perfect cone-shape, triangular and steep, with checkered ice cone waffle texture, even with a line indicating where the waffle has been a folded. It looks like a road up the volcano. Black smoke drift up from the sharp tip, no crater, and drifts left forming a small cloud separated from the rest of the smoke lines.]
- Waffle Cone
- [Standard cone as in the first, but zoomed in so it fills the panel from left to right. The volcano's top has been cut much further down leaving a wide crater from which lava is pouring down the sides in large rivers of different width and length. To the left one long river has almost reached the ground. Cueball is running down the left side, and Megan is running after another Cueball with his arms up on the right side. There is a label with an arrow pointing to the lava:]
- Label: Baking soda and vinegar
- Science Fair Cone
- [Standard cone like the previous, but with more jagged sloped and crater. This volcano erupts with a large explosion with fire and smoke coming out in all directions above the crater. A large sound is written above the explosion:]
- Sound. Doooooot
- Doot Cone
- [This is not a volcano, but the inverse, a cone down into the ground, the ground level no above the center of the panel. The slope down into this cone hole is straight, the ground above is more jagged. At the bottom of the hole sits a small animal with six legs and an open mouth piece sticking up out of the hole. Its fat body is hidden under the ground along with its legs.]
- [Standard volcano cone like the previous volcano. It erupts and the central part shows how the erupting material comes up from below ground level (below the line at the bottom in which the cone it self stands). The erupting material is white rocks on black background. At the top several rocks is blown out of the crater top. The sides of the volcano is filled with blobs small and large, and stones rolling down the sides. There are two labels, each with two arrows. The first labels arrows points to the side of the volcano, the second labels arrows points to the erupting material inside and outside the volcano:]
- First label: Lava
- Second label: Solid rocks
- Inverse Volcano
- [Standard cone like the doot cone, with a crater that bends down in the middle. From this crater eight white ghosts with two black eyes are rising, like the smoke, drifting left. The highest ghost is just reaching the edge at the top left of the panel. The lowest ghost is still inside the crater with its wavy lower parts.]
- Ghost Vent
- [A standard cone like the doot cone. At the top there is lave over the outer edges, some of it running down the side. The inside of the volcano has been drawn like in the inverse volcano, so it is clear that the magma inside the volcano comes up from below ground level (below the line at the bottom in which the cone it self stands). There are two labels that contradicts the description above. The top label outside the volcano points to the lava with an arrow, and the bottom label inside the volcano points to the magma:]
- Top label: Magma
- Bottom label: Lava
- Pedant's Bane
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