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Spacer ImagePublication 090, Part C: Geology of the Rocky Mount, Gladehill, Penhook, and Mountain Valley quadrangles, Virginia
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by J.F. Conley, 15 pages, 1 plate (1:125,000 scale black and white map), 3 figures, 1 table, 1989. This report and the accompanying map portray the bedrock geology of the Rocky Mount, Gladehill, Penhook, and Mountain Valley 7.5-minute quadrangles and include a discussion on the area’s stratigraphy, structure, and economic geology. These four quadrangles are located in the southwestern Virginia Piedmont and occupy portions of Franklin, Henry, and Pittsylvania counties. The rocks mapped in these quadrangles are contained in two major structures: the southeast limb of the Blue Ridge anticlinorium and the northwestern part of the Smith River allochthon. These structures are composed of late Precambrian to Paleozoic metamorphic and igneous rocks and are separated by Bowens Creek Fault. Economic resources described in the text include iron ore, soapstone, dimension stone, and mica. Locations of specific quarries and prospects are shown on the maps of Publications 90A and 90B.
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