24 COLORADO COLLEGE STUDIES. 



THE CEDAR HILLS SANDSTONES. 



The Salt Plain measures are succeeded by a zone of 

 rocks in which unevenly hard, in part massive concretion- 

 ary, fine-grained, bright-red sandstones, having some re- 

 semblance to those of the Red Bluff terrane of the Kiger 

 division, constitute the leading feature. This may be seen 

 a few miles northwest of Hazelton, Kansas, below the 

 Neocene sands which there form the summit of the Cedar 

 hills. From this occurrence, the terrane takes its name. 

 It is finely displayed in the canyon-cut basal incline of the 

 Gypsum hills, southwest of Medicine Lodge, and in the 

 same southeast of ^^tna. The bright-red sandstone in the 

 low bluff north of Sharon and that outcropping on the south 

 fork of the Ninnescah river west of Kingman are provision- 

 ally referred to the Cedar Hills formation. 



This formation has nowhere been measured. From 

 memory, it is roughly guessed at 50 to 75 feet as seen in 

 the basal incline of the Gypsum hills of the Medicine Lodge 

 river and the Salt fork. 



THE FLOWER-POT SHALES. 



Next in order above the Cedar Hills sandstones, but 

 entirely eroded from the summit of the Cedar hills, while 

 seen in full thickness a little farther west in the escarpments 

 of the Gypsum hills, southwest of Medicine Lodge, and tak- 

 ing their name from the well-known Flower-pot mound 

 which has been carved out of them by erosion at the point 

 of the divide between East Cedar and West Cedar creeks, 

 are the Flower-pot shales. These, for ihe most part, are 

 highly gypsiferous clays. 



Flower-pot mound has been named by the residents of 

 Barber county in allusion to the fact that its top is plumed 

 with several small cedars which, outlined against the sky at 

 a short distance, present a fancied resemblance to plants 

 growing from a flower-pot. It is necessary to consider 

 only the top of the mound to see the flower-pot, since other- 



