BULLETIN 612 



SHEET No. 18 



GEOLOGIC AND TOPOGRAPHIC MAP 



OF THE 



OVERLAND ROUTE 



From Omaha, Nebraska, to San Francisco, California 



Base compiled from United States Geological Survey Atlas Sheets, 

 from railroad alignments aud profiles supplied by the Union PaclfiG 

 Bailroad 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, DIRECTOK 



David White, Chief Geologist 



R. B. Marshall, Chief Geographer 



191 



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