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  2. Geology of Ohio - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Ohio

    Ohio's State Invertebrate Fossil, is a trilobite found in the formation. The Southern Hemisphere where Ohio was located at the end of the Ordovician experienced a widespread glaciation, around 438 million years ago. Sea level dropped due to the glaciation, accompanied by a subsidence of the land.

  3. Ohio Shale - Wikipedia

    en.wikipedia.org/wiki/Ohio_Shale

    shale: Location; Region: Ohio: Country: United States: The Ohio Shale is a geologic formation in Ohio. It preserves fossils dating back to the Devonian period. See also.

  4. Cleveland Shale - Wikipedia

    en.wikipedia.org/wiki/Cleveland_Shale

    The Cleveland Shale (or Cleveland Member) is a sub-unit of the Ohio Shale Formation. [7] [19] The Chagrin Shale underlies the Cleveland Shale. [20] The Bedford Shale generally overlies the Cleveland Shale, with a sharp distinction between the two. In west-central Ohio, more than 150 feet (46 m) of Bedford Shale may lie above the Cleveland Shale.

  5. Fairview Formation - Wikipedia

    en.wikipedia.org/wiki/Fairview_Formation

    Grant Lake Formation and Miamitown Shale: Overlies: Kope Formation: Location; Region Ohio ... The Fairview Formation is a geologic formation in Ohio.

  6. Miamitown Shale - Wikipedia

    en.wikipedia.org/wiki/Miamitown_Shale

    Grant Lake Formation: Overlies: Fairview Formation: Location; Region Ohio: Country United States: The Miamitown Formation is a geologic formation in Ohio.

  7. Bedford Shale - Wikipedia

    en.wikipedia.org/wiki/Bedford_Shale

    The Bedford Shale in Ohio has been extensively studied since 1943, [23] and the 1954 study by Pepper, de Witt, and Demarest was still considered the classic study of the formation as late as 1991. [24] The Bedford Shale is present throughout much of Ohio. [25] [26] Outcrops extend along Lake Erie from the Ohio-Pennsylvania border west to Lorain ...

  8. Chagrin Shale - Wikipedia

    en.wikipedia.org/wiki/Chagrin_Shale

    The Chagrin Shale is found in north-central and northeastern Ohio, and in northwestern Pennsylvania. [7] The Chagrin Shale reaches a maximum thickness of 1,200 feet (370 m) in eastern Ohio. [7] In Ohio, the Chagrin Shale is thin in the west, [2] [3] and thickens as it proceeds east. [7] The Chagrin Shale also extends south into West Virginia. [9]

  9. Cuyahoga Formation - Wikipedia

    en.wikipedia.org/wiki/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 ]