File:Bituminous coal (Lower Mercer Coal, Pottsville Group, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 4.jpg

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English: Bituminous coal under fossiliferous limestone in the Pennsylvanian of Ohio, USA. (geology hammer for scale)

The rocks shown above are part of the Pottsville Group, a Pennsylvanian-aged cyclothemic succession containing nonmarine shales, marine shales, siltstones, sandstones, coals, marine limestones, and chert ("flint"). The lower Pottsville dates to the late Early Pennsylvanian. The upper part dates to the early Middle Pennsylvanian. The Lower-Middle Pennsylvanian boundary is apparently somewhere near the Boggs Limestone horizon (?).

The blackish-colored layer near the bottom of the photo is bituminous coal (= Lower Mercer Coal). The light brown-colored layer at the center & top of the photo is fossiliferous limestone with chert nodules (= Boggs Limestone).

Stratigraphy: Lower Mercer Coal (= Number 3 Coal), just below the Boggs Limestone, middle Pottsville Group, lower Atokan Stage, lower Middle Pennsylvanian

Locality: Mt. Pleasant North Outcrop - near the top of a roadcut on the eastern side of Rt. 93, just north of the town of Mt. Pleasant, southern Washington Township, southern Hocking County, southeastern Ohio, USA (39° 23' 51.35" North latitude, 82° 27' 14.15" West)
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Source https://www.flickr.com/photos/47445767@N05/23241178256/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/23241178256. It was reviewed on 20 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

20 October 2020

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current02:01, 20 October 2020Thumbnail for version as of 02:01, 20 October 20203,000 × 4,000 (4.63 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/23241178256/ with UploadWizard

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