page_title: Cuyahoga Formation
hierarchical_section_title: Cuyahoga Formation
caption_attribution_description: (photo by James Cheshire) The Cuyahoga Formation is a marine, mixed-siliciclastics succession in the Lower Mississippian of eastern Ohio. Many members and submembers have been named, based on whether the dominant lithology is shale or sandstone. At the river cut shown here, gray shale is interbedded with siltstones and finer-grained sandstones. This is the Raccoon Shale Member, named after Raccoon Creek, which runs from Alexandria to Granville to Newark, Ohio. Stratigraphy: Raccoon Shale Member, Cuyahoga Formation, Kinderhookian Stage, lower Lower Mississippian Locality: outcrop along the South Fork of the Licking River, Licking County, east-central Ohio, USA
context_page_description: 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 to the Middle Osagean. 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.
context_section_description: 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.
caption: Raccoon Shale (Cuyahoga Formation; Heath, Ohio)
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