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Cuyahoga Formation
Stratigraphic range: Mississippian
Meadville Shale Member of the Cuyahoga Formation exposed in Lodi, Ohio.
Type	Formation
Unit of	Waverly Group
Sub-units	In Central and Southern Ohio Meadville Shale Sharpsville Sandstone Racoon Shale Fairfield Member Dugway Member Buena Vista Member In Pennsylvania and North Eastern Ohio Meadville Shale Sharpsville Sandstone Orangeville Shale
Underlies	Logan Formation
Overlies	Sunbury Shale
Location
Region	Ohio
Country	United States

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.

It preserves fossils dating to the Mississippian subperiod of the Carboniferous period.

See also

• List of fossiliferous stratigraphic units in Ohio

References

1. Ausich, William I.; Guenther, Robert L. (February 1996). "Blastoids from the Cuyahoga Formation of Ohio (Echinodermata; Lower Mississippian)". Kirtlandia: 2. Retrieved April 8, 2018.
2. Keroher, Grace (1966). Lexicon of Geologic Names of the United States For 1936–1960. Part 3, P–Z. Geological Survey Bulletin. U.S. Department of the Interior, Geological Survey. p. 3552.
3. Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

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• Carboniferous Ohio
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