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Editing 40d:Volcano
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− | + | A '''volcano''' is a vent in the planet's crust through which lava and pyroclastic materials are expelled. They're usually created through plate tectonics in subduction zones, but they can form anywhere magma is capable of breaking through to the surface. | |
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== Locating volcanoes == | == Locating volcanoes == | ||
[[Image:Volcanoes-located.gif|thumb|400px|right|In order to begin on the volcano the starting plot must cover the ≈. Also note the volcano's name displayed under the biome information - this will be shown even if your plot isn't over the caldera. Click on this image to see the larger version.]] | [[Image:Volcanoes-located.gif|thumb|400px|right|In order to begin on the volcano the starting plot must cover the ≈. Also note the volcano's name displayed under the biome information - this will be shown even if your plot isn't over the caldera. Click on this image to see the larger version.]] | ||
− | + | In Dwarf Fortress, volcanoes are named [[mountain]]s that additionally provide a source of [[magma]]. | |
− | + | Volcanoes tend to occur around the rim of [[ocean]]s. Sometimes, probably in a nod to shield volcanoes which form from heavy molten rocks, volcanoes also form in the middle of oceans. In other locations their placement appears to be random; they are not always associated with [[mountain]] ranges or other rocky terrain. They do not appear on the World Map window and must be found through the Region Map. | |
− | Sometimes a [[magma | + | To start on a map that includes a volcano, you will have to search for one. On the fortress location selection screen, most of the time they are not visible on the world map. Scroll around the world looking for a red ^ in the regional map. Select that space, and in the local map, move your starting area to include the square with a dark red ≈, which is the caldera. There may also be additional local magma vents in nearby tiles around the volcano. |
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+ | Sometimes a [[magma vent]] will exist in an area with no volcanoes nearby. | ||
== Living on a volcano == | == Living on a volcano == | ||
− | Volcanoes provide ready access to [[obsidian]], which a [[craftsdwarf]] can form into a rock short | + | Volcanoes provide ready access to [[obsidian]], which a [[craftsdwarf]] can form into a rock short sword. It can also be used to make more valuable rock crafts and furniture. It's possible to divert water into magma to form your own obsidian, although it's often present in great quantities. |
− | The volcanic activity also leads to an abundance of heavy | + | The volcanic activity also leads to an abundance of heavy extrusive igneous rock (such as basalt, felsite and andesite) under a layer of farmable materials. The nature of these rock layers also provides for many useful ores such as [[iron]] (through hematite or other means), [[gold]], [[galena]], and other non-precious metals. The rock also provides useful gems such as [[turquoise]]s and [[zircon]]s, and occasionally [[diamond]]s. Genuine volcanoes sometimes have other interesting features, similar to named mountains: they are frequently sites for [[cave]]s, often have a wider than usual variety of [[stone]] and [[ore]], and may include unusual features such as [[cave river]]s, [[chasm]]s or [[pit]]s. |
− | + | Occasionally your group may end up embarking over lava, and it may be time to reembark. Other times a message about the cavern collapsing may occur, and this may be due to a pool of water which was spawned above the volcano's crater, instantly crystalizing the magma and then falling into the crater. | |
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