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

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

Buena Vista Member, Cuyahoga Formation; Reynoldsburg, Ohio

Paleopebble (Dugway Member, Cuyahoga Formation; Licking County, Ohio)

Gray sandstone (Fairfield Member, Cuyahoga Formation; Hocking Hills, Ohio)

Raccoon Shale (Cuyahoga Formation; Heath, Ohio)

Sharpsville Sandstone Member (Cuyahoga Formation; Cuyahoga Falls, Ohio)

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

See also

• Earth sciences portal
• Ohio portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Ohio