GEOLOGIC AND TOPOGRAPHIC . MAP 



OF THE 



SHASTA 



ROUTE 



From Seattle, Washington, to San Francisco, California 



Base compiled from United States Geological Survey Atlas 

 Sheets, from railroad alignments and profiles supplied by 



informa 



tion collected with the assistance of this company 



UNITED STATES GEOLOGICAL SURVEY 



GEORGE OTIS SMITH, DIRECTOR 



Wh 



R. B. Marshall. Chief Geographer 



1915 



Each quadrangle shown on the map with a name In parenthesis in the 

 Jower left corner is mapped in detail on the U. S. G. S. Topographic 



r 



Sheet of that name. 



BULLETIN 614 



SHEET n 



fc!»i^f-A« - -J A^. -«.1^U£J| -*l 



POti_«7^C*^'_ &L 



EXPLANATION 

 A Stream deposits (alluvium and Red Bluff formation > 

 B Lava flows and tuffs 'andesites and some rhyolites) 

 C River gravels (auriferous) and fine tuffs 



D 



F 



H 



Gravels, in part marine, locally auriferous, with marine 

 sandstones and clays ' lone and Tejon formations) 



Conglomerate, sandstones, and shales iChico, Horse- 

 town, and Knoxville formations) 



Altered sedimentary and igneotis rocks underlying 

 auriferous gravels of Sierra Nevada 



Quatemao' 



Tertiary 



Cretaceous 



[Mesozoic 

 -< and 

 [Paleozoic 



I o 



AdU 



I o 



1 



Scale 500:00(^ 

 Approximately 8 miles to t inch 



I r ■ - ' 



J- 



£ 



15 



X 



^ ■ * . T 1. t X. 



10 

 I I I 



20 



25 



■-■''- ■' — *■ 



' ' 



?0Mil 



aoWtometers 



Contour interval 200 feet 



ELEVATiONS IN Fe€T ABOVE MEAN SCA LEVEL 



The disunces from Seattle. Washington. Are shown B^ry 10 miles 

 The cros-sties on the railrotds are spaced / mile apart 



