The preparation of illustrations for reports of the United States Geological survey : with brief descriptions of processes of reproduction (1920)

Ridgway, John L. (John Livesy), b. 1859, United States. Dept. of the Interior, Geological Survey (U.S.) · Washington, D.C. : Government Printing Office · leaf 73

An illustration from The preparation of illustrations for reports of the United States Geological survey : with brief descriptions of processes of reproduction, 1920, leaf 73 — PREPARATION OF ILLUSTRATIONS PLATE VII U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER Sfl7 PLATE Vn 86 00 EXPLANATION … Ouray limestone (Whxte or Ivght^nU aaccharoidai tirmntone) e 2 ^ 1 A 5 12 8 11 10 9 7 13 J8 l-» 15 17 16 Ignacio quartzite 19 23 2* 20 21 22 (/hin-bfdded ffray or 26 27 25 29 2B 30 pink vavy qnartzii^) 33 34 35 36 - 31 DIAGRAM OF TOWNSHIP Schist (dense bluish-ffray Tocks with subordinate • • )…

Topographical drawing · Map drawing

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The preparation of illustrations for reports of the United States Geological survey : with brief descriptions of processes of reproduction (1920)

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