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The GeoFacts (GF) series offers short explanations of geologic subjects.

GF 1.  Bedrock Topography of Ohio [530 KB PDF]
GF 2.  Industrial-Mineral Mine-Permitting Procedures in Ohio—No longer available.
GF 3.  Earthquakes and Seismic Risk in Ohio—Updated 5/2012. [193 KB PDF]
GF 4.  Ohio Shale Concretions [580 KB PDF]
GF 5.  Ohio Trilobites [289 KB PDF]
GF 6.  Isotelus: Ohio's State Fossil [285 KB PDF]
GF 7.  The Scioto Saline—Ohio's Early Salt Industry [459 KB PDF]
GF 8.  Landslides in Ohio [247 KB PDF]
GF 9.  Gold in Ohio [488 KB PDF]
GF 10.  The Teays River [1.53 MB PDF]
GF 11.  Rocks and Minerals Mined in Ohio and Their Uses [121 KB PDF]
GF 12.  Mine Subsidence [398 KB PDF]
GF 13.  The Geology of Ohio—The Precambrian [243 KB PDF]
GF 14.  History of Coal Mining in Ohio [299 KB PDF]
GF 15.  Coal Mining and Reclamation [128 KB PDF]
GF 16.  Coal and Electricity [138 KB PDF]
GF 17.  Fossil Collecting in Ohio [212 KB PDF]
GF 18.  Rock and Mineral Clubs in Ohio—No longer available. (See the Ohio page from the Midwest Federation of Mineralogical & Geological Societies.)
GF 19.  Sand and Gravel [154 KB PDF]
GF 20.  The Geology of Ohio—The Cambrian [188 KB PDF]
GF 21.  Where to See Ohio's Geology [188 KB PDF]
GF 22.  The Effects of the Great New Madrid Earthquakes in Ohio [176 KB PDF]
GF 23.  A Brief Summary of the Geologic History of Ohio [114 KB PDF]
GF 24.  Tiny Hidden Treasures—The Microfossils of Ohio [318 KB PDF]
GF 25.  High-Calcium Limestones in Ohio [220 KB PDF]
GF 26.  Aglime: Agricultural Limestone and Dolomite in Ohio [309 KB PDF]

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