 ... Goldfield. Much of the quartz, including some good ore, has a fine granular texture and has in part been formed by the silicification of shattered or crushed rhyolite. Typical vein quartz, such as is characteristic of the gold veins of the Appalachians...  The Mercury Minerals from Terlingua, Texas - Page 22by William Francis Hillebrand, Waldemar Theodore Schaller - 1909 - 174 pagesFull view - About this book
 | Geology - 1907 - 874 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or such as is found in the pre-Tertiary schists of the Bullfrog district, does not occur in...texture, and is usually intercrystallized with calcite. The presence of so much calcite in veins traversing rhyolites, rocks exceptionally low in lime, is... | |
 | Geology - 1910 - 884 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or such as is found in the pre-Tertiary schists of the Bullfrog district, does not occur in...exception of the Original Bullfrog. The quartz is j>revailingly fine grained, often of a porcelain-like texture, and is usually intercrystallized with... | |
 | Henry Gannett - Geography - 1906 - 644 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or -such as is found in the prc-Tertiary schists of the Bullfrog district, does not occur in the mines near Ithyolite, with the exception of the Original Bullfrog. The quartz is prevailingly fine grained, often... | |
 | Geological Survey (U.S.) - Geology - 1907 - 128 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or such as is found in the pre-Tertiary schists of the Bullfrog district, does not occur in...texture, and is usually intercrystallized with calcite. The presence of so much calcite in veins traversing rhyolites, rocks exceptionally low in lime, is... | |
 | Geological Survey (U.S.) - Geology - 1910 - 166 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or such as is found in the pre-Tertiary schists of the Bullfrog district, does not occur in...or shattered the original filling, the crystals of pyrite are changed to specks of limonite, within which may occasionally be seen particles of native... | |
 | Mineral industries - 1910 - 822 pages
...characteristic of the gold veins of the Appalachians or Sierra Nevada or such as is found in the preTertiary schists of the Bullfrog district, does not occur in...or shattered the original filling, the crystals of pyrite are changed to specks of limonite, within which may occasionally be seen particles of native... | |
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