Madison Limestone and Bighorn Dolomite

Madison Limestone or Group - Group includes Mission Canyon Limestone (blue-gray massive limestone and dolomite), underlain by Lodgepole Limestone (gray cherty limestone and dolomite). Bighorn Dolomite - Light-gray massive siliceous dolomite.
State Wyoming
Name Madison Limestone and Bighorn Dolomite
Geologic age Middle Ordovician-Upper Mississippian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Carbonate > Dolostone
Comments COMU box only shows Upper and Middle Silurian to Lower Devonian. Arrows extend age down through, up into Upper Mississippian
References
NGMDB product
Counties Johnson - Washakie