Mineral Resources of Alaska: Report on Progress of Investigations in 1908U.S. Government Printing Office, 1909 - 418 Seiten |
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Alaska Analysis August bed rock bench bowlders Bulletin canyon cassiterite cement cent chalcopyrite Chignik claim clay coal contains copper country rock County Creek at mouth deposits depth dike diorite district ditch drainage basin dredge east elevation Fairbanks fault feet thick Fork formation Ganes Creek geologic gold granite granodiorite gravels greenstone ground Gulch Hill igneous inches Innoko intrusive Iron Creek July Lignite lime limestone localities located lode lower magnetite manganese masses material mica Mineral Resources U. S. mining Mountain Nome northeast occur operations outcrop oxide pegmatite places porphyry portion present probably production prospecting psilomelane pyrite quartz quartzite region reported Rept ridge River sand sandstone schist second-feet Seward Peninsula shaft shale shows siliceous slates slope sluicing square miles stream strike sulphides surface Survey Taylor Peak tion tributaries tunnel U. S. Geol upper valley wolframite Yukon zone
Beliebte Passagen
Seite 372 - Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. "Run-off in inches...
Seite 372 - ... unit. Owing to the confusion arising from its use it has been defined by law in several States. The California miner's inch is in most common use in the United States and was defined by an act approved March 23, 1901, as follows: "The standard miner's inch of water shall be equivalent or equal to 1 J cubic feet of water per minute, measured through any aperture or orifice.
Seite 417 - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Seite 97 - SCHRADER, FC, Mineral deposits of the Cerbat Range, Black Mountains, and Grand Wash Cliffs, Mohave County, Ariz.: Bull.
Seite 17 - Mineral deposits of the Cerbat Range, Black Mountains, and Grand Wash Cliffs, Mohave County, Arizona: US Geol.
Seite 163 - IRVING, JD. Some recently exploited deposits of wolframite in the Black Hills of South Dakota: Am.
Seite 364 - States 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 The one marked " Exhausted " is not available for distribution, but may be seen at the larger libraries of the country.
Seite 372 - Run-off in inches" is the depth to which the drainage area would be covered if all the water flowing from it in a given period were conserved and uniformly distributed on the surface. It is used for comparing run-off with rainfall, which is usually expressed in depth in inches. "Acre-foot...
Seite 279 - XLV. 463 pp. 1903. CLEMENTS, JM, SMYTH, HL, BAYLEY, WS, and VAN HISE, CR The Crystal Falls iron-bearing district of Michigan. Monograph XXXVI.
Seite 418 - No. 259. 1905, pp. 172-185. Geology and coal resources of Cape Lisburne region, Alaska, by AJ Collier. Bulletin No.