BULLETIN 612 



SHEET No. t4 



GEOLOGIC AND TOX^OGRAPHIG MAP 



OF THTC 



OVERLAND EOUTE 



From Omaha, Nebraska, to San Francisco, California 



Base compiled from United States Q-eolOj^ical Survey Atlas Sheets, 

 from railroad alignments and profiles supplied by the Union Pacific 

 Railroad Company and the Southern Pacific Company and from addi- 

 tional information collected with the assistance of these companies 



UNITED STATES GEOLOGICAL SURVEY 



GEORGE OTIS SMITH, DIBECTOK 



David White, Chief G-eologist 



R. B. Marshall, Chief Geographer 



1915 



Bach quadrangle shown on ike map with a name in parenthesis in the 

 lower left comer is mapped in detail on the U. S. G. 5. Topographic 

 sheet of that name. 



EXPLANATION 



Thickness 

 in feet 



A 



B 



C 



D 



£ 



F 

 G 



Sandstone and conjflomerate; fresh-water 

 deposits; includes Knight, Fowkes, and 

 Almy formations (Wasatch group) 



Sandstone, shale, and coal; fresh-water 

 deposits (Evanston formation) 



Sandstone and shale; brackish and fresh- 

 water deposits (Adaville formation) 



Shale; marine deposit (Hilliard formation) 



Sandstone, shak. and coal, (includes 



Oyster Ridge sandstone member) ; 

 marine and brapkish water deposits 

 (Frontier fomfxation) 



Shale; marine deposit (Aspen formation) 



Sandstone and shale: fresh and brackish 

 water deposits (Bear River formation) 



2.600-6.200 



Tertiary 



0-1,600 



Cretaceous 

 or Tertiary 



4.000 



5,500-6,800 



2.200-2.600 

 1,500-2.000 



500-5.000 



Cretaceous 



H 



i 



J 



Sandftlone. congloin crate, shale, and lime- 

 stone; marine and fresh-water deposits 

 (Beckwith and Twin Creek formations) 3.800 - 5.500 



Sandstone and shale; marine deposits 

 * Nugget f 1.700 ^ ), Ankareh ^ 1.500 ± >. 

 Thavnes a.TOOi >. and Woodside 

 (1.000 1 > formations; 5.900 



riimestone; marine deposit (Park City formation) 1,500±' 

 j3uartzite; marine deposit (Weber quartzite) 4,000± 



Jurassic 

 possibly some 

 Cretaceous 



Tria&sic 

 may include^ 

 some Jurassic 



Carboniferous 



11 1 '30 



WYOMING-UTAH 



A 



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H 



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rrrt 



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DiAGKAMMATIC SECTION SHOWING FORMATfONS CROSSED BETWEEN ASPEN AMD WAHSATCH 



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Scale 



500.000 



M 



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Approximately 8 miles to 1 inch 



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Contour interval 200 feet 



ELEVATIONS TjV FEET ABOVE MEAN SEA LEVEL 



The distances from Omaha, Nebraska, are shown every 10 mifes 

 The ovssties on the railroads are spaced I mils apart 



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