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40d:Igneous extrusive layer
Revision as of 01:38, 8 March 2010 by Briess (talk | contribs) (moved Igneous extrusive layer to 40d:Igneous extrusive layer: 40d namespace migration)
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.)
They can contain any of...
- copper ore
- galena (for lead & silver)
- gold
- hematite (for iron)
- native aluminum
- tetrahedrite (for copper and possibly silver),
...as well as a varying spectrum of gems.
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.
- (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.)