File:Report of the Geological exploration of the fortieth parallel (1871) (14727906226).jpg

Identifier: reportofgeologic31871unit (find matches)
Title: Report of the Geological exploration of the fortieth parallel
Year: 1870 (1870s)
Authors: United States Geological Exploration of the Fortieth Parallel (1867-1881) King, Clarence, 1842-1901 Hague, A. (Arnold), 1840-1917 Emmons, Samuel Franklin, 1841-1911 Hague, James D. (James Duncan), 1836-1908 Meek, F. B. (Fielding Bradford), 1817-1876 Hall, James, 1811-1898 Whitfield, Robert Parr, 1828-1910 Ridgway, Robert, 1850-1929 Watson, Sereno, 1826-1892 Eaton, Daniel Cady, 1834-1895 Bien, Julius, 1826-1909
Subjects: Geology Mines and mineral resources Paleontology Botany Birds
Publisher: (Washington : Govt. Print. Off.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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that thecontinuation of the vein Fis in the ground between A B and CD. A cross-cut, therefore, from B would first meet with the vein F. Should the latterpresent features similar to those of the vein ABCD, there might be diffi-culty in recognizing it as a different vein, thus giving occasion for a disputebetween the owners or claimants of the vein A B CD and the owners of thevein F. TiMOKE Mine.—This is the southeasternmost of the three mines that havebeen successfully worked on the North Star vein. Though having but ashort extent of developed ground it has been one of the most profitable minesin the district, considering the amount of capital originally invested. It isopened by means of an incline, 80 feet from the northwest boundary line thatseparates the property from the claim of the Manhattan. The incline followsgenerally the dip of the ledge, which for a distance of 350 feet is about 30degrees. The vein presents the general characteristic features already de- 3t i Plate 3SYI1.
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Scale: lioo. CENTEAL AND EASTEEN NEVADA. 357 scribed in the foregoing pages. The ore-bearing quartz is from two feet totwo inches in width, sometimes pinching out altogether, leaving only a smallclay-seam between the walls of the fissure. The ore-seam, though generallynarrow, is composed of rich silver-bearing minerals, associated with less basemetal than is found further to the northwest. Thus far the productive por-tion of the ground has been altogether westward of the incline, that is, be-tween the incline and the northwest boundary. Some exploring levels havebeen driven to the southeastward, but, so far as the writer is informed, theywere quite unproductive, the vein being pinched up and barren. West of the incline the ground has been almost entirely stoped out fromthe 350-foot level up to the surface; the average value of its milling ore issaid to have been about $175 per ton. At 350 feet depth in the incline, thevein was cut ofi abruptly by a slide or cross-vein, having nearly a

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