File:Fossil plant stem in coal (Bedford Coal, Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) (31533285300).jpg

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Fossil plant stem in coal from the Pennsylvanian of Ohio, USA. (~6.4 cm across at its widest)

This rock is from 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 Member (?).

The sample is derived from the Bedford Coal, a horizon that occurs just below the Upper Mercer Limestone (or Upper Mercer Flint). Lithologically, the Bedford ranges from carbonaceous shale to argillaceous coal to bituminous coal to cannel coal. The cannel coal in the Bedford was targeted for mining in the 1800s as a source of fuel. It was particularly useful in the manufacture of kerosene, an illuminating fuel. After the petroleum industry started in the 1860s, production of kerosene from cannel coal essentially ceased.

At this locality, the Bedford Coal consists of cannel coal and bituminous coal. This bituminous coal specimen has a compressed plant stem from a lycopod, or scale tree.

Classification: Plantae, Lycophyta

Stratigraphy: Bedford Coal, upper Pottsville Group, Atokan Stage, lower Middle Pennsylvanian

Locality: Tunnel Hill North Portal Outcrop (= Noland Tunnel's northern portal), ~1.75 air miles north-northeast of the town of Tunnel Hill, western Coshocton County, eastern Ohio, USA (~40° 16’ 33.27” North latitude, ~82° 01’ 53.04” West longitude)
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Source Fossil plant stem in coal (Bedford Coal, Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA)
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@N05/31533285300. 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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Date/TimeThumbnailDimensionsUserComment
current17:26, 24 June 2017Thumbnail for version as of 17:26, 24 June 20172,215 × 2,148 (3.8 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via Flickr2Commons

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