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| View Original: | Bulletin 426 Fig 15 Quartz vein Cowherd quarries.jpg (805x480) | |||
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| Keywords: Bulletin 426 Fig 15 Quartz vein Cowherd quarries.jpg en Figure 15 Original caption Quartz vein in Cowherd quarries Columbia VA showing jointing coincident with schistosity of inclosing gneiss 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 | ||||
