File:Semi-anthracite coal (Langhorne Coal, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) 20 (30182846890).jpg
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Semi-anthracite coal from the Mississippian of Virginia, USA. (handlens for scale) This sample is from the best outcrop anywhere of the only economically significant Mississippian-aged coal occurrence in the world. The beds are structurally tilted - this occurred during the Allegheny Orogeny in the Pennsylvanian. The coal shown above is from the Langhorne Coal. At this site, the unit is tectonically-thickened and sheared. The rank is semi-anthracite coal, which results from very low grade metamorphism of bituminous coal. Adjacent beds (shales and sandstones) are not metamorphosed. The Langhorne Coal has been mined in the past. Stratigraphy: lowermost upper member, Price Formation, Osagean Stage, upper Lower Mississippian Locality: roadcut on the eastern side of Rt. 100, western end of Cloyds Mountain, south of the town of Poplar Hill, Pulaski County, Valley Coalfield, southwestern Virginia, USA (= locality shown in figure 9 of Bartholomew & Brown, 1992) (37° 10' 42.39" North latitude, 80° 42' 48.48" West longitude) Some info. from: Bartholomew, M.J. & K.E. Brown. 1992. The Valley Coalfield (Mississippian age) in Montgomery and Pulaski Counties, Virginia. Virginia Division of Mineral Resources Publication 124. 33 pp. 2 pls. Gensel, P.G. & K.B. Pigg. 2010. An arborescent lycopsid from the Lower Carboniferous Price Formation, southwestern Virginia, USA and the problem of species delimitation. International Journal of Coal Geology 83: 132-145. |
| Date | |
| Source | Semi-anthracite coal (Langhorne Coal, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) 20 |
| 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@N05/30182846890 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:59, 7 December 2019 | | 2,942 × 2,421 (5.01 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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