PROSSER. | The Upper Permeaan. 95 
positive there in its character than in Kansas and thicker and more 
complex than the Cave Creek; and if the latter should be ranked as 
a formation, the Dog Creek should be also. In central Oklahoma the 
Dog Creek is a great dolonute formation, laminated dolomites occupy- 
ing a very great part of its thickness, and a great body of such dolo- 
mite forming there its uppermost member. Thus it is strongly dis- 
tinguished from the Kiger above it as well as from the Cave Creek 
below. It is well displayed in the stony hills, east of Watonga, 
which take their name from the profusion of irregularly broken 
plates and slabs formed by weathering upon its outcrops. It ts 
shown quite as well in the infrasylvan amphitheater at the head of 
Salt creek, where the formation is at least 100 feet thick. 
“The Cave Creek persists in its tripartite character, the Sheiner 
eypsum having a thickness of 15 to 18 feet in central Oklahoma, and 
the Medicine Lodge gypsum and Jenkins clay being correspondingly 
well developed. The Cave Creek should undoubtedly be raised to 
what you call formation rank.” 
