Minerals found in Ohio
From Ohio History Central websiteMinerals of Ohio Minerals are naturally occurring elements or compounds that are the constituents of igneous, metamorphic, and sedimentary rock. In unusual circumstances, minerals may grow…
GeoFacts Guides from ODNR
Geofacts are very interesting short publications concerning geology in OhioFrom the Ohio Dept of Natural Resources:GeoFacts No. 1 - Bedrock topography of Ohio [530 KB PDF] GeoFacts No. 2 -…