ART. 16 ZEOLITES FROM OEEGON HEWETT, SHANNON, GONTER 



The basalt has not been studied microscopically, but doubtless its 

 mineral make-up is that generally characteristic of the rock in north- 

 ern Oregon. 



Although the basalt flows appear to be nearly horizontal over a 

 large area, observations made during this investigation indicate that 



lOO 200 300 400 vSOO FT- 



Fig. 1. — Sketch map of Ritter Hot Sfeing area^ Grant Cocnty^ Oeeg. 



INTERVAL approximating 20 FEET 



Contour 



there are a number of gentle anticlines which trend northwest, and 

 a few faults of small displacement roughly parallel to the anticlines. 

 Kitter lies near the crest of a gentle anticline that plunges northwest, 

 and the spring issues from a fault that trends north of west, along 

 which the flows on the south side have dropped about 20 feet. 



