Bulletin of the United States Geological SurveyThe Survey., 1907 |
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abundant altered Amargosa Range andesite augite bands basalt Belted Range biotite biotite andesite bowlders breccias Bullfrog Cactus Range calcite Cambrian Cambrian rocks Camp Canyon chlorite color conglomerate contemporaneous crystals dacite Death Valley deposits desert gravels diameter dikes diorite diorite porphyry earlier rhyolite Eureka facies faults feldspar flow folds formation formed GEOLOGY glassy Goldfield hills grains granite gray groundmass hornblende IGNEOUS ROCKS inch interbedded kaolinized Kawich Range later rhyolite latite lava limestone limonite lithologically Lone Mountain magnetite mapped mass microscope miles north miles south minerals monzonite porphyry muscovite occur older alluvium orthoclase Pahute Mesa Paleozoic Paleozoic rocks Panamint Range pebbles pegmatite phenocrysts plagioclase playa Pliocene Pogonip limestone porphyry portion post-Jurassic probably pyrite quartz veins quartz-monzonite porphyry quartzite sandstone schist sedimentary rocks shale Siebert lake beds silicified Silver Peak Silver Peak Range Silverbow similar Spurr Stonewall Mountain sulphides surface Tertiary thin Tonopah U. S. Geol
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Seite vi - WS 164. . Underground waters of Tennessee and Kentucky west of Tennessee River and of an adjacent area in Illinois, by LC Glenn.
Seite vi - Spurr. 1906. 174 pp., 24 pis. B 289. A reconnaissance of the Matanuska coal field, Alaska, in 1905, by GC Martin. 1906.
Seite vi - Veatch. 1907. —pp., 26 pis. B 308. A geologic reconnaissance in southwestern Nevada and eastern California, by SH Ball. 1907. 218 pp., 3 pis.
Seite 41 - The climate must have been moist and the presence of fossilized wood in the lake beds shows that trees flourished near its shores. While the lake was thus for the most part fresh, periods of aridity alternated with those of comparative humidity, and the lake or portions of it were partially desiccated, permitting the local precipitation of limestone, gypsum, and boron minerals.
Seite iii - Graton, with notes on the Dahlonega mines, by W. Lindgren. 1906. 134 pp., 9 pis. B 294. Zinc and lead deposits of the upper Mississippi Valley, by H. Foster Bain. 1906.
Seite i - Systematic geology and paleontology; D, Petrography and mineralogy; E, Chemistry and physics; F, Geography; G, Miscellaneous; H, Forestry; I, Irrigation; J, Water storage; K, Pumping water; L, Quality of water; M, General hydrographic investigations...
Seite vi - B 287. The Juneau gold belt, Alaska, by AC Spencer, and a reconnaissance of Admiralty Island, Alaska, by CW Wright.
Seite 41 - ... was probably during this general period that the most important ore deposits in the Tertiary rocks were formed, presumably by waters heated by the still-hot magmas. Between the outflow of the rhyolite and the formation of the Pahute Lake erosion was probably continuous, partially accounting for the formation of the lake basin which in the main, however, originated through orogenic sinking that was possibly, in part, consequent on adjustments due to the extrusion of immense bodies of lava, a hypothesis...
Seite 16 - Preliminary account of Goldfield, Bullfrog, and other mining districts in southern Nevada, by FL Ransome, with notes on the Manhattan district, by GH Garrey and WH Emmons.
Seite i - The classes numbered 2, 7, and 8 are sold at cost of publication; the others are distributed free. A circular giving complete lists can be had on application. Most of the above publications can be obtained or consulted in the following ways: 1. A limited number are delivered to the Director of the Survey, from whom they can be obtained, free of charge (except classes 2, 7, and 8), on application. 2. A certain number are delivered to Senators and Representatives in Congress for distribution. 3. Other...