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40d:Sedimentary layer
| This article is about an older version of DF. |
Sedimentary stone layers contain hematite, limonite, magnetite, tetrahedrite, bituminous coal, and lignite.
Chalk*, chert, claystone, conglomerate, dolomite*, flint, limestone*, mudstone, rock salt, sandstone, siltstone and shale layers are sedimentary.
- (* These also function as flux.)
The name of a sedimentary layer appears white on the embark menu.
Sedimentary layers are, on average, the most economically valuable of the four mineral layers. They are your only source of bituminous coal and lignite, vital for fueling non-magma forges and for the coke steel-making requires (especially if you lack trees). Even if magma is present, only sedimentary layers contain bauxite, the only stone (other than Hidden Fun Stuff) which can withstand the heat of magma. They are much richer in iron ores than other rock formations. Several sedimentary rocks - dolomite, chalk, and limestone - are fluxes, required for making steel making and also being twice as valuable as normal stone, making them useful for trade goods or furniture.
(In real world geology, sedimentary stone is formed by sediment. The sediment collects in constantly growing heaps and the pressure at the bottom eventually forms the sediment into stone. This is not true for Dwarf Fortress.)
Sedimentary layers[edit]
- Sandstone
- Siltstone
- Mudstone
- Shale
- Claystone
- Rock salt
- Limestone
- Conglomerate
- Dolomite
- Flint
- Chert
- Chalk
Stone found in sedimentary layers[edit]
- Hematite (veins)
- Limonite (veins)
- Bituminous coal (veins)
- Lignite (veins)
- Gypsum (large clusters)
- Jet (large clusters)
- Petrified wood (small clusters)
- Magnetite (large clusters)
- Bauxite (large clusters)
- Kaolinite (large clusters)
- Saltpeter (small clusters)
Gems found in sedimentary layers[edit]
- Onyx (small clusters)
- Schorl (small clusters)
- Lace agate (small clusters)
- Bloodstone (small clusters)
- Moss agate (small clusters)
- Chrysoprase (small clusters)
- Sard (small clusters)
- Carnelian (small clusters)
- Banded agate (small clusters)
- Sardonyx (small clusters)
- Tube agate (small clusters)
- Fire agate (small clusters)
- Plume agate (small clusters)
- Brown jasper (small clusters)
- Picture jasper (small clusters)
- Yellow jasper (small clusters)
- Tigereye (small clusters)
- Tiger iron (small clusters)
- Clear tourmaline (small clusters)
- Gray chalcedony (small clusters)
- Dendritic agate (small clusters)
- White chalcedony (small clusters)
- Fortification agate (small clusters)
- Aventurine (small clusters)
- Indigo tourmaline (small clusters)
- Green tourmaline (small clusters)
- Red tourmaline (small clusters)
- Pink tourmaline (small clusters)
* See also: stone found everywhere