Detroit River Group

Dolomite; brown to gray; medium to thick bedded; laminated; nodules or interbeds of anhydrite and/or gypsum; basal part becomes sandy dolomite or fine-grained sandstone; as much as 170 feet thick.
State Ohio
Name Detroit River Group
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)brown to gray; medium to thick bedded; laminated; nodules or interbeds of anhydrite and/or gypsum; basal part becomes sandy dolomite or fine-grained sandstone; as much as 170 feet thick.
Minor
Sedimentary > Clastic > Sandstone (Bed)basal part becomes sandy dolomite or fine-grained sandstone.
Incidental
Sedimentary > Chemical > Evaporite > Anhydrite (Bed)nodules or interbeds of anhydrite and/or gypsum
Sedimentary > Chemical > Evaporite > Gypsum (Bed)nodules or interbeds of anhydrite and/or gypsum
References

Slucher, E.R., (principal compiler), Swinford, E.M., Larsen, G.E., and others, with GIS production and cartography by Powers, D.M., 2006, Bedrock geologic map of Ohio: Ohio Division of Geological Survey Map BG-1, version 6.0, scale 1:500,000.

NGMDB product
Counties Defiance - Henry - Lucas - Paulding - Putnam - Wood