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| View Original: | Bulletin 426 Plate XXIII C Bared slope of granite gneiss.jpg (1284x648) | |||
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| Keywords: Bulletin 426 Plate XXIII C Bared slope of granite gneiss.jpg Pickens County SC <br>Text from the volume referring to this figure <br> The Beverly quarry operated in 1908 by the Greenville Crushed Stone Company is located at Beverly station on the northwest side of the Atlanta and Charlotte division of the Southern Railway The railroad extends along the southeastern base of the doming ridge in which the quarry is opened The rock is a contorted biotite granite gneiss of medium to dark gray color and medium grain It consists of white potash feldspar orthoclase and microcline white soda-lime feldspar oligocla se clear or barely smoky quartz black mica biotite and a little white mica muscovite together with accessory titanite zircon apatite and iron oxide and secondary chlorite epidote and colorless mica Orthoclase is partly intergrown with a second feldspar as microperthite Microcline shows evidence of having been derived in part from orthoclase Micropegmatite intergrowths as small areas are indicated and some of the larger feldspar individuals show micropoikilitic structure inclosures of rounded quartz chiefly Granulation of the quartz and feldspar is pronounced and orientation of the biotite is usually well marked In the hand specimens much titanite is visible in association with the biotite Here and there pyrite is noted The quarry was opened about 1894 and is approximately 300 by 405 feet with a vertical face of 80 feet the greatest depth of working Sheeting does not occur and pegmatites and knots have very scanty development only a few small ones being observed There is no stripping See Pl XXIII C 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 | ||||
