File:Fossiliferous limestone (Poverty Run Limestone, Lower Pennsylvanian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 1 (32392561574).jpg

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Fossiliferous limestone in the Pennsylvanian of Ohio, USA.

The Pottsville Group is a Pennsylvanian-aged cyclothemic succession in eastern Ohio that contains 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 Member (?).

The rock shown here is a hard, marine fossiliferous limestone (wackestone), with matrix-supported fossils in black micrite. The most conspicuous fossils are crinoid stem columnals and brachiopod shells. Near the lower right is a partially pyritized brachiopod shell. This specimen from the Poverty Run Limestone, which outcrops in very few places.

Stratigraphy: Poverty Run Limestone, lower Pottsville Group, upper Morrowan Stage, upper Lower Pennsylvanian

Locality: Irish Ridge East Outcrop - roadcut along the northern side of the eastbound entrance ramp from Rt. 60 to Rt. 16 (southeastern portion of Rt. 16-Rt. 60 interchange), north-northwest of the towns of Trinway & Dresden, northern Cass Township, northwestern Muskingum County, eastern Ohio, USA (~40° 09’ 13.56” North latitude, ~82° 01’ 29.37” West longitude)
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Source Fossiliferous limestone (Poverty Run Limestone, Lower Pennsylvanian; Irish Ridge East roadcut, near Trinway, Ohio, USA) 1
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@N05/32392561574. It was reviewed on 24 June 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

24 June 2017

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current17:32, 24 June 2017Thumbnail for version as of 17:32, 24 June 20173,658 × 2,624 (4.23 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via Flickr2Commons

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