THE EOCENE PERIOD. 



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g c j Rhyolite, 100-800 

 g I feet 



Roslyn formation, , 

 3500 feet ± 1 



Teanaway basalt, 

 300-4000 feet 





^E 



Fig. 424.— Section of 

 the Eocene in the 

 vicinity of Mt. Stu- 

 art in the central 

 part of Washing- 

 ton. (G.O.Smith, 

 U. S. Geol. Surv.) 



Swauk sandstone, 

 3500-5000 feet 



Pre-Tertiary 



2 ■■>■'''•'• W'J?^ V 



