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andesite basalt beds biotite Bull calcite California Cambrian Canyon Carboniferous Centennial Range character coal Colorado copper Cortez country rock County Creek Cretaceous deposits Describes Devonian dikes district east eruptions Eureka fault feet feldspar figs fissure flows formation fossil galena geology glacial granite granodiorite gray copper groundmass Hill igneous rocks Includes notes Innoko Inst intrusive iron oxide Jour Kuskokwim Lake lavas limestone lode mass Mexico miles mill mine.—The minerals mines Miocene Montgomery-Shoshone Mountain City Nevada northeast northwest occurrence Ordovician Original Bullfrog orthoclase outcrop Paleozoic Peak phenocrysts places plane porphyry pyrite quadrangle quartz quartzite Range region rhyolite River sandstone schist Science sedimentary rocks shaft shale Shoshone Range siliceous Silurian silver Sloan slope strike structure sulphides surface Survey Tenabo Tertiary thickness tilted tunnel Tuscarora U. S. Geol Valley vein vertical volcanic Walcott wall York Yukon zone
Page 33 - 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 6 - 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 35 - A handbook on the minerals and mineral resources of Virginia. Prepared for the Virginia Commission to the St. Louis Exposition.
Page 37 - Smithsonian exploration in Alaska in 1907 in search of Pleistocene fossil vertebrates.
Page 18 - December, 1907, being an account of mining operations for gold, coal, etc., in the Province of British Columbia.
Page 34 - 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 77 - The localization of values in ore bodies and the occurrence of shoots in metalliferous deposits; ore shoots at Butte, Montana: Econ.
Page 22 - ... the evidence furnished by vertebrate fossils of age of certain so-called Permian beds in America. — Jour.