BULLETIN 614 



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 

 the Southern Pacific Company and from additional informa- 

 tion collected with the assistance of this company 



UNITED STATES GEOLOGICAL SURVEY 



GEORGE OTIS SMITH, DIRECTOR 



David White. Chief Geologist 



R. B. Marshall, Chief Geographer 



1915 



Each quadrangle shown on the map with a nanye in parenthesis in the 

 lower hft corner is mapped in detail on the U. S. G. S. Topographic 

 Sheet of that name. 



SHEET 7 



IZS'SO' 



Sheet No. 6 



raybact^^ 



123 



t 



.■^i 



t 



OREGON - CALirORNiA 



Scale 500,000 

 Approximately 8 miles to I inch 



■p ■ ■ 



Contour intervaf 200 feet 



ELtVATtONS IN FEET ABO^E MEAN SEA LEVEL 



Tht <ifstMn<:es from S^uth. Washington. Jr« thown 9^ry 10 miies 

 The crossttet on ihe rdilro*ds ar» spaced I rr.ih apmrt 



^)X¥^ 



:^ 3COO 



'^K-J^/0 



20M;t 



25 30 Kilometers 



~t — a t L-J 



i 



Stream deposits (alluvium 



Lava flows of the Cascade 

 some basalt and rhyolite 

 canic material (tuff) 



EXPLANATION 



\ 



30 



chiefl 



^m-^ 



Sandstones and shales with coal prospects and much tuff 

 (Miocene- Eocene) 



Conglomerates, sandstones, and shales (Chico forma- 

 tion. Upper Cretaceous) 



Intrusive igneous rocks, in part altered {serpentine, 

 granodiorite, and greenstone) 



Sandstones and shales, with some chert (Dothan for- 

 mation) 



Slates (Galice formation) containing fossils like those of 

 the Mariposa slate of (ialifomia 



Slates and limestone (Devonian and Carboniferous)") 



Lava flows and tuffs (Devonian and Carboniferous)J 



J 



\ 



r; 



Jurassic 



Jurassic 



Siskl^Pesk 



I 



V ^ 



IteJftma n 



J 



Sterlm^Fteak 



,0 -r:>:loi^ 



;■ '^ 





'■^.\. 









Paleozoic 



Mica schist 

 Mineral deposits: 



Pre-Paleozoic ? 



Gold 



X Coal 



/ Limestone 



CALIFORNIA 



r^ 



N. 



^ 



J 



% 



Wl--- 



4VV 



'^^ 



- I 



i. 



J 



2u 1 ek» 



S60 . 4? 



I23"30' 



123 



Sheet No. 8 



122^30' 



iBiaP>V'n ^^^ - .- \ifcv tar THt Lua^SKOiOSWiW^SiJTtVtY 



