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Cedar Valley Limestone

Finely crystalline and clastic limestone in upper part with coral and stromatoporoid-rich zones; brown, dolomitic limestone with biostromes of corals and stromatoporoids in middle part; gray argillaceous, fossiliferous limestone in lower part; dominantly dolomite with intervals of gypsum in the subsurface of central and southwestern Iowa.
State Iowa
Name Cedar Valley Limestone
Geologic age Phanerozoic | Paleozoic | Devonian-Middle
Comments Approx thickness 500 ft
Primary rock type limestone
Secondary rock type dolostone (dolomite)
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Map references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Unit references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Counties Benton - Black Hawk - Bremer - Buchanan - Butler - Cedar - Cerro Gordo - Chickasaw - Delaware - Des Moines - Emmet - Fayette - Floyd - Grundy - Hancock - Howard - Jackson - Johnson - Kossuth - Linn - Louisa - Mitchell - Muscatine - Palo Alto - Scott - Tama - Winnebago - Worth