Report of the geological exploration of the fortieth parallel

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, R. P. (Robert Parr), 1828-1910, Ridgway, Robert, 1850-1929, Watson, Sereno, 1826-1892, Eaton, Daniel Cady, 1834-1895, Bien, Julius, 1826-1909, engraver · 1870 · (Washington, D.C. : G.P.O.) · 1 picture

Clarence King's federal survey report on the geology, mining, and natural history of a corridor along the fortieth parallel, issued by the Government Printing Office in Washington from 1870 for Congress and working scientists. The plate here is a folding geological map: hairline engraved topography and township grids in grey, with mineral zones blotted in flat orange and dark grey overprint.

Discoveries in geography · Geology · Mines and mineral resources · Paleontology · Botany · Birds

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