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Keywords: Bulletin 426 Fig 3 McGowan quarry contacts.jpg en Figure 3 Original caption Contact of hornblende-biotite gneiss with granite at McGowan quarry south of Manchester VA 1910 Granites of the Southeastern Atlantic States Bulletin 426 United States Geological Survey Government Printing Office Washington 1910 Watson Thomas Leonard other versions PD-USGov Geology Quarrying |