and the Ka/iisas Sections. 



139 



with little outside connection, as did the Kansas Permian fauna. 

 The same features as before would have controlled its isola- 

 tion. Much of the red beds being almost a land surface a con- 

 siderable part of the time — if we accept the subaerial origin of 

 a large part of the deposits — aggradation may have but slightly 

 overbalanced degradation and they may have accumulated 



Fig. 3. 



slowly for that class of sediments. Thus, though disturb- 

 ances raised the southern part of the Guadalupe limestones 

 above sea level and permitted their partial removal and the 

 subsequent deposition of the upper red beds upon the eroded 

 surface, the fauna may well have been an early Permian fauna. 

 Until further data are at hand I am much inclined to this 

 latter hypothesis. The fact that several hundred feet of the 

 Kansas Permian deposits grade off into typical red beds in a 

 very _ short distance in Oklahoma is suggestive of possible 

 conditions east of the Guadalupes. If such were the case, we 



