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| View Original: | Bulletin 426 Plate XVIII orbicular gabbro-diorite.jpg (1332x1920) | |||
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| Keywords: Bulletin 426 Plate XVIII orbicular gabbro-diorite.jpg gabbro-diorite Davie County NC <br> Text from the volume regarding this figure On the Hairston place 10 miles west of Lexington there are exposures of orbicular gabbro-diorite The rock is of dark color with a greenish cast imparted by the hornblende and diallage It presents a pronounced mottled appearance being made up of dark-green areas of hornblende varying from an eighth of an inch to several inches in diameter set close together with the interstices filled with white feldspar See PI XVIII On a polished surface of the stone the effect is unique and beautiful and the rock should prove of value for ornamental and decorative purposes 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 Igneous petrology of North Carolina Plutonic rocks Orbicular rock Igneous rocks in North Carolina | ||||
