Chemical & Organic Sedimentary Rocks (Names based primarily on composition) Basic Rock Name...
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Transcript of Chemical & Organic Sedimentary Rocks (Names based primarily on composition) Basic Rock Name...
Chemical & Organic Sedimentary Rocks(Names based primarily on
composition)Basic Rock Name• Limestone• Dolostone• Chert• Rock Salt• Rock Gypsum• Peat or Coal
Composition• Calcite• Dolomite• Quartz (silica)• Halite• Gypsum• “Carbon” / Plant Remains
Limestone
CrystallineLimestone
Chalk
Fossiliferous Limestone
Formation of Limestone
Calcite Precipitates inWarm WaterWater Under Low Pressure (Shallow)
Or
It is secreted by biological organismsClams, Mussels, Scallops, etc.CoralsForaminifera
Limestone Represents:
Shallow Tropical Ocean
Chalk(Coccolithopho
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Black Sea
Oolitic Limestone
Travertine(Limestone
)
Dolostone
Chert (Flint, Jasper, Agate…)
Diatom Skeletons
Chert Represents
Deep Ocean
Evaporites:Bonneville Salt Flats, Utah
RockGypsum
Rock Salt
Mediterranean
Geology
Isolated,Arid,Salty
Sea/Lake
Peat and Coal
Swamp, Bog