BULLETIN 612 



SHEET No. 10 



GEOLOGIC AND TOPOGEAPHIG MAP 



OF THE 



OVERLAND ROUTE 



From Omaha, Nebraska, to San Francisco, California 



Base compiled from United States Geological Survey Atlas Sheets, 

 from railroad alignments and profiles supplied "by the Union Pacific 

 Railroad Company and the Southern Pacific Com-p&ny and from addi- 

 tional information collected "with the assistance of these conipanies 



UNITED STATES GEOLOGICAL SURYEY 



GEOBGE OTIS SMITH. DIRECTOR 



David White, Chief Geologist 



R. B. Marshall, Chief Geographer 



1915 



Each quadrangle shown on the map with a name in partnfhesis in the 

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

 sheet of thai name. 



A2' 



EXPLANATION 



A Sandstone, conglomeratic; fresh- water deposits (North Park 

 formation) 



B Sandstone, conglomerate, shale, and coal: fresh water deposits 

 ("Upper Laramie*' formation) 



Sandstone, shale, and coal; brackish and fresh-water deposits 

 ("Lower Laramie" formation) 



Shale ; marine deposit (Lewis shale) 



Sandstone, shale, and coal ; brackish and fresh-water deposits 

 (Mesaverde formation) 



Shale; marine deposit (includes equivalents of Steele shale 

 Niobrara and Frontier formations and Mowry shale) 



Sandstone and shale (probably includes equivalents of Dakota 

 sandstone, Fason formation, and Lakota sandstone); fresh and 

 brackish water deposits (Cloverly formation) 



Sandstone and shale ; fresh-water deposit ; (Morrison formation 



1 Sandstone and shale; marine deposit (Sundance formation) 



J Red sandstone, shale, and grypsum; fresh or brackish water 

 deposits (Chug'water formation ) 



Limestone and sandstone ; marine deposits (Casper formation) 



106*30* 



ThscknesB 

 in feet 



WYOMING 



10.000 



Tertiary 



Tertiary, possibly 

 including some 

 Cretaceous i o 



U L,! 



Scale 



500. OCO 



Approximately 8 miles to 1 inch 



10 



20 Miles 



6,200± 

 3.200i= 



I 



5 10 15 20 25 



J ■ ■ 1- * — L.k.,-t^i ■ I » -^ f * * ■ ' ' * * ■ 



aoKilcmeters 



Contour interval 200 feet 



2 JOG 



> Cretaceous 



3,000 



TChlOO 



150-200 



ELEVATIONS IN FEET ABOVE MEAN SEA LEVEL 



The distances from Omaha, Nebraska, are shewn every 10 miles 

 The crossties on the railroads are spaced I mile apart 



'^V^ree^eout Hills 



Jurassic or 

 Cretaceous 



100:^ Juraasic 



1.0004. 



Triassic or 

 Permian 



800i Carboniferous 



^ 



^^cxTiti' 



v-* 





Pit 



w 



^^co 



> 





.<&' 



•r 





I 





o/ 



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oo 



h 



650 



■M'€^2^10 



■V 



^.^^ 



r- 



(yiP 



G-^ 



e'<s 



tL> 



^600, 



620 



e 



>. 



t7BOO 







/AWiio 



■ T£t.6S 



<^CfAf% 



Watcott 



IN. 



Rock Kiver 



EL 65j04 



Lewis 

 shaJe 



'^' 



6800 



aooo 



zo^ 



^. 



head Mr 



/ 





ver^^n 



Tra 



( 





tn 



0*-/ 



■C: 



4. • / 



30' 



Vi 



1 



w 





It 



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fry '^n^ 



'Ppe. 



'.A i> 



B 



t\on 



Cfiu^wat^C. 



107" 



PROFILE SECTION SHOWING FORMATIONS C 



D OR VISIBLE BETWEEN HARPER *ND FORT 



ELE 



t06* 



