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Semi-anthracite coal (Merrimac Coal, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) 1 : 無料・フリー素材/写真

Semi-anthracite coal (Merrimac Coal, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) 1 / James St. John
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Semi-anthracite coal (Merrimac Coal, Lower Mississippian; Cloyds Mountain roadcut, Valley Coalfield, Virginia, USA) 1

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ライセンスクリエイティブ・コモンズ 表示 2.1
説明Semi-anthracite coal in the Mississippian of Virginia, USA.This is 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 bed shown here is the Merrimac Coal. Its rank is semi-anthracite coal, which results from very low grade metamorphism of bituminous coal. Adjacent beds are not metamorphosed. The Merrimac Coal (& the subjacent Langhorne Coal - not visible in this shot) have been mined in the past. Thin interbeds of fossiliferous clayshale are present within the Merrimac Coal.Stratigraphy: Merrimac Coal, lower part of the upper member, Price Formation, Osagean Stage, upper Lower MississippianLocality: 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.
撮影日2016-10-14 09:09:22
撮影者James St. John
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