Chemical Sedimentary Rocks

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5 Terms

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Chemical sedimentary rocks

Form by the precipitation of minerals directly from a solution

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Evaporites

Chemical rocks that form by the evaporation of water, such as gypsum and halite Thick deposits often require restricted basins

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Travertine

A non-evaporite chemical rock (CaCO3) that precipitates when groundwater degasses CO2 at springs

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Dolomite (Dolostone)

A non-evaporite chemical rock (CaMg[CO3]2) that can form by a reaction between limestone and magnesium in groundwater

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Replacement Chert

A non-evaporite chemical rock where cryptocrystalline quartz replaces calcite in limestone or cellulose in wood (petrified wood)