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Meramec Series

Ste. Genevieve Limestone- fossiliferous limestone and red and green shale. Approx. thickness 50 ft. St. Louis Limestone- limestone and dolomite, sandstone locally perdominant; locally contains chert. Spergen Formation- sandy micaceous dolomite.
State Iowa
Name Meramec Series
Geologic age Phanerozoic | Paleozoic | Carboniferous Mississippian-Late
Comments Approx. total thickness 150 ft.
Primary rock type limestone
Secondary rock type dolostone (dolomite)
Other rock types shale; sandstone; chert
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Incidental
Sedimentary > Chemical > Chert (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 Boone - Calhoun - Dallas - Davis - Des Moines - Hamilton - Hardin - Henry - Humboldt - Iowa - Jasper - Jefferson - Keokuk - Lee - Louisa - Mahaska - Marion - Marshall - Monroe - Pocahontas - Poweshiek - Sac - Story - Van Buren - Wapello - Washington - Webster - Wright