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Difference between revisions of "Igneous extrusive layer"

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'''Igneous extrusive stone layers''' are formed from [[andesite]], [[basalt]], [[dacite]], [[obsidian]], and [[rhyolite]].  Of these five, andesite, dacite, and rhyolite are functionally identical, different only in appearance and name, basalt is like the other three with the caveat that it is magma-safe, and obsidian is... unique.
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[[File:igneous_extrusive_preview.png|thumb|260px|right|Created when magma exits a volcano and cools above the Earth's surface.]]
 
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'''Igneous extrusive''' [[stone layers]] are formed from [[andesite]], [[basalt]], [[dacite]], [[obsidian]], and [[rhyolite]].  Of these five, andesite, dacite, and rhyolite are functionally identical, different only in appearance and name, basalt is like the other three except that it is magma-safe, and obsidian is... unique.
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==Igneous extrusive layers==
 
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<small>* See also: [[stone found everywhere]]</small>
 
<small>* See also: [[stone found everywhere]]</small>
  
==In the Real World==
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==In Real Life==
In real world Geology, Igneous Extrusive [[stone]] is formed by lava solidifying above the surface, open to the air. This is the main point of difference from [[igneous intrusive layer|igneous intrusive]] stone, which solidifies below the surface. This distinction is not kept in Dwarf Fortress Geology, in which the difference is simply the name and the contents of the two types of stone.
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In real-world geology, Igneous extrusive [[stone]] is formed by lava solidifying above the surface, open to the air. This is the main point of difference from [[igneous intrusive layer|igneous intrusive]] stone, which solidifies below the surface. This distinction is kept in ''Dwarf Fortress'' geology, with extrusive being the top layer around volcanoes and never the bottom-most layer, while intrusive is always the bottom layer and never the top.
  
 
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{{Category|Stone Layers}}
 
{{Category|Stone Layers}}
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[[ru:Igneous extrusive layer]]

Latest revision as of 17:35, 7 May 2024

This article is about the current version of DF.
Note that some content may still need to be updated.

Created when magma exits a volcano and cools above the Earth's surface.

Igneous extrusive stone layers are formed from andesite, basalt, dacite, obsidian, and rhyolite. Of these five, andesite, dacite, and rhyolite are functionally identical, different only in appearance and name, basalt is like the other three except that it is magma-safe, and obsidian is... unique.

Igneous extrusive layers[edit]

Stone found in igneous extrusive layers[edit]

Stone appearing in both igneous intrusive and igneous extrusive layers[edit]

Gems found in igneous extrusive layers[edit]

Gems appearing in both igneous intrusive and igneous extrusive layers[edit]

* See also: stone found everywhere

In Real Life[edit]

In real-world geology, Igneous extrusive stone is formed by lava solidifying above the surface, open to the air. This is the main point of difference from igneous intrusive stone, which solidifies below the surface. This distinction is kept in Dwarf Fortress geology, with extrusive being the top layer around volcanoes and never the bottom-most layer, while intrusive is always the bottom layer and never the top.

Sedimentary
Igneous
Intrusive
Extrusive
Metamorphic
Ore
Economic
Other