BULLETIN 612 



SHEET NO. 1 



GEOLOGIC AND TOPOGRAPHIC MAP 



OF THE 



OVERLAND ROUTE 



From Omaha, Nebraska, to San Francisco, California 



Base compiled from United States Q-eological Survey Atlas Sheets, 

 from railroad alignments and profiles supplied by ttie Union Pacific 

 Hailroad Company and the Southern Pacific Company and from addi- 

 tional information collected with the assistance of these companies 



UNITED STATES GEOLOGICAL SURVEY 



G^EORGE OTIS SMITH. DIPvECTOB 



David White, Chief Geologist 



R. B. Marshall, Chief Geographer 



1915 



Bach quadrangle skoum on the map with a name in parenthesis in the 

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

 sheet of that name. 



\QV>IA - NEBRASKA 





DIAGRAM OF UNION RACIFIC BRIDGE: OVER MISSOURI RIVER AT OMAHA 



1 



Scale 



500,000 



I 



■ ' 



Approximately 8 miles to 1 inch 



'9 



■ — \ 1 , 



1 



I I I r 



15 



J. 



' ' ' 



20 Miles 



-J 



1 



lO 



15 



20 



3oKilometers 



'-^'n'P '""' O^ """---^ 







Contour interval 200 feet 



ZVBVAriOHS IN FEET ABOVE MEAN SEA LEVEL 



^^',,„, The distances from Omaha, Nebraska, are shcum every 20 miles 



The crossHes on the railroads 



COUNCILBLUFFS 



30' 



EXPLANATION 



The rock formations indicated on this map can not be seen from the train. 

 They are covered by recent stream deposits (alluvium) or by material (loess 

 and till) deposited during the ice age (Pleistocene). Information aboux 

 them is derived largely from distant exposures and from well borings 



41 



Se'ao' 



96 



