i ■ 



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 name in parenthesis in the 

 lower left comer is mapped in detail on the U. S. C S. Topographic 

 Sheet of that name. 



EXPLANATION' 



A 



depos 



Quaternary 



B Lava flows (basalt) 



C Aurifeixms river gravels and fine tuff 



D 



F 



G 



H 



Tuffs (Tuscan tuff. Piiocene)^ gravels, sands, and clays 

 (lone formation, Eocene) 



Conglomerates, sandstones, and shales ^Chico. Horse- 

 town, and Knoxviile formations) 



Sandstones and shales, with flinty beds (cherts) made 

 up of microscopic siliceous skeletons ot radiolarians 

 and limestones made up of microscopic calcareous 

 foraminifers (Franciscan group) 



Altered sedimentary and igneous rr»cks underlying 

 auriferous gravels of Sierra Nevada 



Tertiary 



Cretaceous 



Jurassic (?) 



Mesozoic 



and 

 Paleozoic 



BULLETIN 614 



SHEET to 



Sheer 



/Va9 



\ 



« 



^ 



-^ed^S 



RED BLUFF/ 



err- 



V 



r* 



^OO 



Rawson 



< 



•600' 



\ 



I2r30' CALIFORNIA 



Probe rraVt°_ 



^er' Tyler 



X* Tehama 



Vi'T EL.223A 



6" 



V 



MUl 



\ 



Richffield 



£L.2S6 



\; 



I 



c • > 



.Corning 



■-v 





■ 



r\ 



\ 



i 



\ 



1 



— 40 



Scale 500.0<K) I 



Approxirra**ly 8 mt'es to t inch 



20M 





I r 



Kirk wood 

 £L.220 



760 



Malton 



Sl.250 



Soto 



LCana 



760TirL./73 



\^ 



f o 



■*.i. fc 4 



^^■i4 



2S 30KitortH«ter3 



-A 



I 



\ 



V 



o 



Orland 



Nord 



\ 

 \ 



i) 



I 



A 



Greenwood 



\ 



V^ 



Contour interval 200 feet 



CLCVA7ION% #M fCLT ABOVL V£AN M* t£WCL 



Th* disu/fCM from S9*tth. Washington. jr« shown 9vry 10 mtlm 

 Th* croMitms Oft tht r»ilra*rfs «r« spac«rf / mh •?•« 



/ 



ii > 



V 



•«^ 



A 



V 





^13 



"CHICOk 





V-'? 



n 



» * 



:s 



.*> 



n% 



\ 



Germantown 



.Durham sf 





/ 



\ 



\ 



i: 



Jacinto 



"^^POSfU 



\ 



\ 



\ 



,780 

 Willows 



Glenn 



r 





/ 



/ 



iNelsorr 



f 



OhoviMc 



\ 



,Rlchv ale »- 



St ream 



IS its 



utte City 



/ 



t 



n 



Lo^andala 



ELJOZ 



Norman 

 ■790 



ceton 



,0' 



De!evan 



EL.9S 



i 



1 



\ 



i 



rcsa ^^< 



,1 



ib^ — - 





Gridle 



(^heetDI 



122- 



f No.il 



. 



oncut -,1^ 



k«h 



i2r3o 



391 



3C. 





nj-i 



,s;>/i,'*0 fH>,^^ j,i f^^ U-S-GCOuj^ltAL jikiiVtY 



