Chagrin Shale

Chagrin Shale
Stratigraphic range: Famennian
A fossil in the Chagrin Shale
TypeFormation
Unit ofOhio Shale
UnderliesCleveland Shale, Cussewago Sandstone
OverliesHuron Member
Lithology
PrimaryShale
Location
Region Ohio
Country United States
Type section
Named forChagrin River
Named byCharles S. Prosser

The Chagrin Shale is a shale geologic formation in the eastern United States that is approximately 365 million years old. The Chagrin Shale is a gray shale that begins thin and deep underground in north-central Ohio. As it proceeds east, the formation thickens, rises to the surface, and contains greater amounts of siltstone.