Proceedings Am. Philos. Soc. Vol. Lll. No 212 



Plate XL 



Fig. a. 



Fig. b. 



Fig. a. Point of the Arches from Shi Shi Beach near Neah Bay, Wash- 

 ington. A characteristic exposure of Franciscan rocks such as form the Olympic 

 complex. 



Fig. b. Diabase flow intercalated in Arago beds (Tejon series) on Umpqua 

 River near Glide, Oregon. 



