560 



DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 





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Oregon 



and Northern 



California. 



Kennet formation ; 

 shale, sandstone, 

 limestone lenses. 



Unconformity. 



Balaklala rhyolite 

 and Copley met- 

 aandesite (De- 

 vonian or older). 



C-. 



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Central 



Washington. 





<?-. 



.. 



.. 



~ 





Western 

 Geostnclinal 



B^lt, 

 49th Parallel. 



?-. 



.. 



5*-. 



~ 



(?-. 





Western 



British Columbia 



and Yukon. 



. 





.. 



- 



Shuswap series; 

 gneiss, mica- 

 schists, lime-sto- 

 nes and quartites. 





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Vallenar series (at 

 least in part Devo- 

 nian) ; blue lime- 

 stones, calcareous 

 and clay slates. 



Wales series (proba- 

 bly in part at least, 

 Silurian) ; crystal- 

 line limestones and 

 slates. 



Graptolitic black 

 shales found on 

 Dean River, Brit- 

 ish Columbia. 



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