Cuyahoga Formation

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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

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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).^[1] Eight members are recognized, among them the Orangeville Shale, Sharpsville Sandstone, and Meadville Shale.^[2]

It preserves fossils dating to the Mississippian subperiod of the Carboniferous period.^[3]

References

^ Ausich, William I.; Guenther, Robert L. (February 1996). "Blastoids from the Cuyahoga Formation of Ohio (Echinodermata; Lower Mississippian)". Kirtlandia: 2. Retrieved April 8, 2018.
^ 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.
^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

Chronostratigraphy of Ohio

Cisuralian	Dunkard Group Greene Formation Washington Formation

⁋

Gzhelian	Dunkard Group Waynesburg Formation Monongahela Group Uniontown Formation Pittsburgh Formation
Kasimovian	Conemaugh Group Casselman Formation Glenshaw Formation
Moscovian	Allegheny Group Pottsville Group

Viséan	Maxville Limestone
Tournaisian	Cuyahoga Formation Logan Formation Sunbury Shale
Coldwater Shale Rushville Shale

Upper

Famennian	Bedford Shale Berea Sandstone Cussewago Sandstone Ohio Shale Cleveland Shale Chagrin Shale Huron Shale)
Frasnian	Burket Shale Olentangy Shale (upper)

West Falls Group: Angola Shale; Rhinestreet Shale

Middle

Givetian	Tully Formation Mahantango Formation Olentangy Shale (lower) Plum Brook Shale Prout Limestone Silica Formation
Eifelian	Amherstburg Dolomite Columbus Limestone Delaware Limestone Detroit River Group Hillsboro Sandstone Marcellus Shale

Lower

Emsian	Amherstburg Dolomite Detroit River Group Hillsboro Sandstone
Lochkovian	Holland Quarry Shale

Pridoli

Bertie Formation

Ludlow

Ludfordian	Salina Group
Gorstian	Salina Group Guelph Dolomite

Wenlock

Homerian	Lockport Group Gasport Dolomite Guelph Dolomite Goat Island Dolomite

Drowning Creek Formation

Manitoulin Dolomite

Upper	Arnheim Formation Cincinnati Group Drakes Formation Fairview Formation Grant Lake Formation Kope Formation Liberty Formation Miamitown Shale Queenston Shale Saluda Formation Trenton Limestone Waynesville Formation Whitewater Formation
Middle	Black River Group Lexington Limestone Point Pleasant Formation Trenton Limestone Wells Creek Formation