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40d:Igneous extrusive layer
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| This article is about an older version of DF. |
Igneous extrusive stone layers are formed from andesite, basalt, felsite, obsidian, and rhyolite. Of these five, all but obsidian are absolutely identical within the game (distinguished only by their names and their un-mined presentation on the map.)
Their name appears dark gray on the embark menu. They also indicate a good chance of magma being present nearby in some form or another.
Igneous extrusive layers
Stone found in igneous extrusive layers
- Hematite (veins)
- Native copper (veins)
- Galena (veins)
- Cinnabar (veins)
- Brimstone (small clusters)
- Realgar (small clusters)
- Orpiment (small clusters)
- Stibnite (small clusters)
- Native aluminum (small clusters)
- Alunite (large clusters)
Stone appearing in both igneous intrusive and igneous extrusive layers
- Native gold (veins)
- Cobaltite (veins)
- Pyrolusite (small clusters)
- Hornblende (small clusters)
Gems found in igneous extrusive layers
- Turquoise (small clusters)
Gems appearing in both igneous intrusive and igneous extrusive layers
- Black zircon (small clusters)
- Green zircon (small clusters)
- Red zircon (small clusters)
- Brown zircon (small clusters)
- Yellow zircon (small clusters)
- Clear zircon (small clusters)
* See also: stone found everywhere
In the real world
In real world geology, igneous extrusive stone is formed by lava solidification on the surface, as opposed to igneous intrusive stone which forms below the surface. This is not true for Dwarf Fortress.)