558 



DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



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 J 2 



Q M 



Q O 



Q 



Tejon formation; 

 sandstone and con- 

 glomerate. 



t 



o 

 o 



Chico formation. 

 Unconformity. 



Granodiorite and gra- 

 nite batholiths (Jur- 

 assic?) 



Diorite and gabbro 

 stocks (Jurassic ?) 



o 



.0 



a 



5Q 



Oregon 



and Northern 



California. 



Arago formation, 

 Ore. ; sandstone, 

 shale and coal. 



s 



Chico formation ; 

 sandstone, shale 

 and conglomer- 

 ate. 



Shasta series : 

 Horsetown form- 

 ation ; sand- 

 stone & shale. 

 Knoxville forma- 

 tion ; shale, 

 sandstone. 

 Myrtle formation. 

 Ore. ; conglom- 

 erate, sandstone 

 and shale. 

 Quartz -diorite 

 stocks. 



1 



Central 

 Washington. 



Roslyn formation ; 



sandstone, shale 



and coal. 

 Teanaway basalt. 

 Kachess rhyolite. 

 Swauk formation ; 



conglomerate,ark- 



ose, sandstone and 



shale. 

 Puget group of coast. 



1 



© 



IS 







8 

 =0 



Western 

 Geosynclinal 



Belt, 

 49th Parallel. 



Kruger alkaline 

 intrusive bod y(?) 



Huntingdon form- 

 ation ; conglom- 

 erate, sand stone, 

 shale and coal- 

 beds. 



o 



Pasayten series, 

 upper part; 

 shale and sand- 

 stone. 



Pasayten series, 

 lower part; sand- 

 stone, conglom- 

 erate, shale and 

 breccia. 



Tamihy series (?) ; 

 rocks like Pas- 

 ayten series. 



Rossland volcan- 

 icsinpart?; Phoe- 

 nix volcanic for- 

 mation ? (chiefly 

 andesitic). 





Western 



British Columbia 



and Yukon. 



c 



u 

 be 



CO 3" 



3 & 



"1 



o 



Nanaimo group; 

 conglo merates, 

 shales and sand- 

 stones ; some coal 

 seams. 



Queen Charlotte 

 group; conglomer- 

 ates, sandstones, 

 shales and ag- 

 glomerate.". 



•2. 



5 

 5 



Southeastern 

 Alaska. 



en 

 .£ 

 CD 



'eS 

 C 

 CD 



w 





Sandstones, shales 

 and coals (Kuiu 

 Island). 



Unconformity. 



Gravina series (Meso- 

 zoic ?) ; conglomer- 

 ates and slates. 



Kasaan greenstone 

 (Mesozoic?) ; i n - 

 trusives and extru- 

 sives. 



1 



s 



i 



Eocene. 











