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Spacer ImageReport of Investigations 011: Geology of the Leesburg quadrangle, Virginia
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by E.C. Toewe, 52 pages, map in color, 14 figures, 6 tables, 1966. Map shows the geology and mineral resources of the Leesburg 7.5-minute quadrangle. The Leesburg quadrangle is located in Loudoun County in northern Virginia. It is within both the Piedmont and Blue Ridge physiographic provinces. The rocks of the area include Precambrian or Cambrian metabasalt, Cambrian quartzite, Triassic conglomerate, sandstone, shale, pyroclastic rock, diabase and basalt. Crushed diabase is produced for use as road aggregate in the area. Map includes cross-sections.
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