412 



UNITED STATES MINERAL RESOURCES 



120 



EXPLANATION 



Rocks younger than 

 Coast Range thrust 



Rocks of Great Valley sequence 

 lying above Coast Range thrust 



Eugeosynclinal (Franciscan) 

 rocks lying beneath Coast 

 Range thrust 



Older, generally metamorphosed 

 rocks and late Mesozoic gran- 

 itic rocks 



r 





EXPLANATION 



Coast Range thrust, a late Mes- 

 ozoic or early Tertiary sub- 

 duction zone 



Dotted where concealed. Ha- 

 chures on overthrust side 



Major strike slip fault or fault 



zone 



Dashed where inferred; dotted 



where concealed 



MERCURY DEPOSITS 



▲ 

 Major deposit mentioned in text 



Less productive deposit 



100 MILES 



100 KILOMETERS 



Figure 49. — Relation of mercury deposits of California to the Coast Range thrust. 



