Cuyahoga Formation
The Cuyahoga Formation is a geologic formation in Ohio. The age of the formation is difficult to determine, because of a lack of diagnostic fossils. Roughly, the formation dates from the Late Kinderhookian (354.8 to 350.8 million years ago) to the Middle Osagean (347.7 to 344.5 million years ago). Eight members are recognized, among them the Orangeville Shale, Sharpsville Sandstone, and Meadville Shale.
| Cuyahoga Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
Meadville Shale Member of the Cuyahoga Formation exposed in Lodi, Ohio. | |
| Type | Formation |
| Unit of | Waverly Group |
| Sub-units | Buena Vista Member, Dugway Member, Fairfield Member, Racoon Shale, Sharpsville Sandstone, Meadville Shale |
| Underlies | Logan Formation |
| Overlies | Sunbury Shale |
| Location | |
| Region | Ohio |
| Country | United States |
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It preserves fossils dating to the Mississippian subperiod of the Carboniferous period.
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