THE PKR.MIAN SYSTEM IN KANSAS. 3 



stratigraphic continuity or e\en parallelism of physico- 

 geographic conditions can be traced between them. It 

 therefore seems necessary to treat the Permian north 

 and south of the Ouachita mountain system as belonging 

 to two distinct basins, and proliiless to attempt divisional 

 correlation between them. 



The following schedule represents the writer's pro- 

 visional section and 



CLASSIFICATION OF THE ROCKS OF THE 

 PERMIAN SYSTEM IN KANSAS. 



II. The Cimarron Series. 



DIVISIONS. FORMATIONS. 



Big Basin sandstone.* 

 Hack berry shales. 

 Kiger. Day Creek dolomite. 



Red Bluff sandstones. 

 Dog Creek shales. 



Cave Creek gypsums. 

 Flower-pot shales. 

 Salt Fork. Cedar Hills sandstones. 



Salt Plain measures. 

 Harper sandstones. 



/. The Big Blue Series. 



DIVISIONS. FORMATIONS. 



Wellington shales. 

 Geuda salt-measures. 



Sumner. 

 Flint Hills. 



Chase limestones. (Prosser.) 

 Neosho shales. (Prosser.) 



In round numbers, the thickness of the Permian 



rocks of Kansas is estimated at 2,200 feet, which may be 



roughly apportioned among the leading subdivisions as 



follows, it being borne in mind that there is great 



geographical variation in the thickness of most of the 



formations above the Chase and below the Medicine 



Lodge: In the Big Blue series, 900 to 1,100 feet; in 



♦The Day Creek and the Big Basin are the only formations of 

 the Kansas Permian that seem to be absolutely simple terranes, or 

 to consist each of a single bed. 



