Geofacts are very interesting short publications concerning geology in Ohio
From the Ohio Dept of Natural Resources:
| GeoFacts No. 1 | – | Bedrock topography of Ohio [530 KB PDF] |
| GeoFacts No. 2 | – | Industrial-mineral mine-permitting procedures in Ohio. |
| GeoFacts No. 3 | – | Earthquakes and seismic risk in Ohio [171 KB PDF] |
| GeoFacts No. 4 | – | Ohio Shale concretions [580 KB PDF] |
| GeoFacts No. 5 | – | Ohio trilobites [289 KB PDF] |
| GeoFacts No. 6 | – | Isotelus: Ohio’s State Fossil [285 KB PDF] |
| GeoFacts No. 7 | – | The Scioto Saline–Ohio’s early salt industry [459 KB PDF] |
| GeoFacts No. 8 | – | Landslides in Ohio [247 KB PDF] |
| GeoFacts No. 9 | – | Gold in Ohio [488 KB PDF] |
| GeoFacts No. 10 | – | The Teays River [1.53 MB PDF] |
| GeoFacts No. 11 | – | Rocks and minerals mined in Ohio and their uses [121 KB PDF] |
| GeoFacts No. 12 | – | Mine subsidence [342 KB PDF] |
| GeoFacts No. 13 | – | The geology of Ohio–the Precambrian [243 KB PDF] |
| GeoFacts No. 14 | – | History of coal mining in Ohio [299 KB PDF] |
| GeoFacts No. 15 | – | Coal mining and reclamation [128 KB PDF] |
| GeoFacts No. 16 | – | Coal and electricity [138 KB PDF] |
| GeoFacts No. 17 | – | Fossil collecting in Ohio [212 KB PDF] |
| GeoFacts No. 18 | – | Rock and mineral Clubs in Ohio [136 KB PDF] |
| GeoFacts No. 19 | – | Sand and gravel [154 KB PDF] |
| GeoFacts No. 20 | – | The geology of Ohio–the Cambrian [188 KB PDF] |
| GeoFacts No. 21 | – | Where to see Ohio’s geology [166 KB PDF] |
| GeoFacts No. 22 | – | The effects of the great New Madrid earthquakes in Ohio [176 KB PDF] |
| GeoFacts No. 23 | – | A brief summary of the geologic history of Ohio [114 KB PDF] |
| GeoFacts No. 24 | – | Tiny hidden treasures–the microfossils of Ohio [318 KB PDF] |
| GeoFacts No. 25 | – | High-calcium limestones in Ohio [220 KB PDF] |