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abundant altered andesite appears bands basalt beds biotite bodies Bull Bullfrog calcite California Canyon Carboniferous carry character claim closely composed considerable contains copper Creek crystals deposits Describes developed dikes distance district east exposed extensive fault feet feldspar figs figure fissure flow followed formation formed fossils fragments Geol geology glass gold granodiorite Hill Includes Innoko intrusive iron Jour Lake lava less limestone locally lode lower mass material miles mill minerals mines Mountain movement nearly northwest notes occurrence origin outcrops oxidized parallel Peak phenocrysts places planes Pleistocene porphyry present probably pyrite quartz quartzite Range region relations rhyolite River rocks sandstone schist Science sedimentary sericite shaft shale shown shows side silver slope strike structure surface Survey Tertiary thickness tunnel upper Valley vein wall wide York zone
Page 31 - Mineralogy Simplified. Easy Methods of Identifying Minerals, including Ores, by Means of the Blow-pipe, by Flame Reactions, by Humid Chemical Analysis, and by Physical Tests. By...
Page 2 - The former are determined by lines of levels run either in both forward and backward directions or by simultaneous double-rodded lines, a highgrade instrument being used and special precautions being taken in observations and reduction to correct errors and make the line continuously good throughout. The latter or primary levels are determined with the Y level, precautions being taken against only the principal errors and the levels being run...
Page 33 - A handbook on the minerals and mineral resources of Virginia. Prepared for the Virginia Commission to the St. Louis Exposition.
Page 35 - Smithsonian exploration in Alaska in 1907 in search of Pleistocene fossil vertebrates.
Page 16 - December, 1907, being an account of mining operations for gold, coal, etc., in the Province of British Columbia.
Page 32 - Southern extension of the Kootenai and Montana coal-bearing formations in northern Montana.
Page 16 - Gray, compact limestone; lighter in color than the Hamburg limestone, traversed with thin seams of calcite; bedding planes very imperfect. Prospect Mountain quartzite. 1,500 Bedded brownish-white quartzites, weathering dark brown; ferruginous near the base; intercalated thin layers of arenaceous shales; beds whiter near the summit. reconnaissance. Devonian fossils have been described0 from several places in the Pinyon Range, among them Chimney station, Hot Spring Creek, and Pinyon Pass.
Page 75 - The localization of values in ore bodies and the occurrence of shoots in metalliferous deposits; ore shoots at Butte, Montana: Econ.
Page 20 - ... the evidence furnished by vertebrate fossils of age of certain so-called Permian beds in America. — Jour.