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30 feet Alaska apatite appears arsenopyrite average Beaver Creek sand bedrock beds biotite calcite Canyon carbonate cent cerusite chalcocite Chattanooga shale chiefly clay coarse contains copper country rock crystalline crystals deposits depth dikes diorite drilled east Edisto feet deep feet thick feldspar field formation galena Geology gneiss gold grains granite gravels gray Gulch gypsum ilmenite inches inclosing Innoko irregular Lime limestone localities marl mass material mica miles Mineral Resources U. S. Mountains Nenzel Nenzel Hill northeast northupite northwest occurs open cut outcrop Owens Lake pegmatite phosphate pirssonite places potash probably production prospect pyrite quadrangle quartz range region reported Rept rhyolite ridge River Rochester rutile saline salt sample sandstone schist Searles Lake sedimentary shaft shale side silver slope specimens sphalerite stopes streams surface tunnel U. S. Geol Valley vein Wayne County width zone
Page 417 - These publications, except those to which a price is affixed, can be obtained free by applying to the Director, United States Geological Survey, Washington, DC The priced publications may be purchased from the Superintendent of Documents, Government Printing Office, Washington, DC ADAMS, GI, and others.
Page 48 - ... of a fireproof building for the library, remains as urgent as before. The conflagration which destroyed a large part of the City of Chelsea, last spring, shows that the best protection from such a disaster is a large open space. The grounds of the Botanic Garden and Observatory form such a space, a quarter of a mile long, and an eighth of a mile wide. Many small fires occur in the district northwest of the Observatory, which, with a strong wind like that which prevailed during the Chelsea fire,...
Page 425 - The chief commercial granites of Massachusetts, New Hampshire, and Rhode Island: Bull.
Page 43 - The smelter is 6l/2 miles from Tooele Junction on the main line of the San Pedro, Los Angeles & Salt Lake railroad, where connection is made with the Tooele Valley railroad, and plants and yards cover onehalf square mile. Crushing and sampling 5-story building, 2 complete sections using the Brunton >yst«r of sampling, contains 8 Blake type crushers, 9 to irx!5 to 24" in size and 8 rolls, 12 to 15...
Page 417 - Geological Survey, Washington, DC The priced publications may be purchased from the Superintendent of Documents, Government Printing Office, Washington, DC Those marked "Exhausted" are not available for distribution, but may be seen at the larger libraries of the country.
Page 3 - ... importance to warrant a more extended description; (2) preliminary reports on economic investigations the results of which are to be published later in more detailed form. These papers are such only as have a direct economic bearing, all topics of purely scientific interest being excluded. They have been grouped according to...
Page 426 - The geology of the road-building stones of Massachusetts, with some consideration of similar materials from other parts of the United States.
Page 72 - Orthoclase and microcline are the most common varieties of feldspar found in pegmatite. In many places, however, a variety of plagioclase, either albite or oligoclase, makes up part or all of the feldspar component.
Page 61 - The Cashin Mine, Montrose County, Colo.," US Geol. Survey Bull. 285, pp. 125-128, 1906. Gale, HS, " Geology of the Copper Deposits near Montpelier, Bear Lake County, Idaho,