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



Plate XLII 



Fig. a. 



Fig. b. 



Fig. a. Tufl'aceous San Lorenzo sandstone (Astoria series) at old Smith 

 Quarry, Eugene, Oregon. 



Fig. b. Weathered basic tuffs interbedded in San Lorenzo formation (As- 

 toria series) on Vance Creek southwest of Union City, Washington. 



