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Difference between revisions of "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.
 
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.]]
  
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Because of the natural tendency for Magma to turn into obsidian when coming in contact with water, digging alongside the magma chamber may provide an easy route underneath the [[aquifer]] and into the perfectly dry stone and ore deep below.
 
Because of the natural tendency for Magma to turn into obsidian when coming in contact with water, digging alongside the magma chamber may provide an easy route underneath the [[aquifer]] and into the perfectly dry stone and ore deep below.
  
Due to the random nature of map generation, occasionally your group may end up embarking directly over [[magma|lava]] and it will shortly be time to select a new fort location. Other times a message about the cavern collapsing may occur the instant you embark - this is because the volcano is "inserted" into the already existing landscape, and it can "cut" through a supporting wall.
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Due to the random nature of map generation, occasionally your group may end up embarking directly over [[magma|lava]], and it will shortly be time to select a new fort location. Other times a message about the cavern collapsing may occur the instant you embark - this is because the volcano is inserted into the already existing landscape, and it can cut through a supporting wall.
  
 
{{World}}
 
{{World}}
  
 
[[Category:World]]
 
[[Category:World]]

Revision as of 03:22, 30 June 2008

Old0c3822.png This article needs to be fixed.
It is old and somewhat inaccurate, like these ruins.

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.

Locating volcanoes

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 mountains that additionally provide a source of magma.

Volcanoes tend to occur around the rim of oceans. 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.

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.

Sometimes a magma vent will exist in an area with no volcanoes nearby.

Living on a volcano

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 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 turquoises and zircons, and occasionally diamonds. Genuine volcanoes sometimes have other interesting features, similar to named mountains: they are frequently sites for caves, often have a wider than usual variety of stone and ore, and may include unusual features such as cave rivers, chasms or pits.

Because of the natural tendency for Magma to turn into obsidian when coming in contact with water, digging alongside the magma chamber may provide an easy route underneath the aquifer and into the perfectly dry stone and ore deep below.

Due to the random nature of map generation, occasionally your group may end up embarking directly over lava, and it will shortly be time to select a new fort location. Other times a message about the cavern collapsing may occur the instant you embark - this is because the volcano is inserted into the already existing landscape, and it can cut through a supporting wall.

Worlds