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 39
PREPARATION OF ILLUSTRATIONS PLATE III 1 i'Mj 1!1'M*I I'll ) ' / 1 1 1 1 1 1 1 1 1 1 1 ® ".-ft-: ) i i 1 1 1 ) 1 il'l; ■ O ■ b I.I . I . ~r- @ 16 15 I I , — r" II I , "^~ Thin-bedded limestone Massively bedded limestone Sandy limestone 26 a Shale b Sandy shale Calcareous shale or shaly llmestOTie … Schist Contorted schist «■•'■ ■II ^^ \< //ll \\„ (1 '-■■■^■ // "' * ''^ II ' "a"^ % ' ■vii:^ji ■ --: 7/ Massive igneous rock Massive igneous rock Massive igneous rock #*;?;>')» Hf if * » if if. M * i( * r68) 67 if if >!■ it: ^ ^ :^ K if ^ if >( /f * -ji n a s_ Massive igneous rock Massive igneous…
Topographical drawing · Map drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
