THE PERMIAN SYSTEM IN KANSAS. 9 



division, reference should be made to the account of the 

 Neosho and Chase formations in Professor Prosser's paper 

 above cited. 



Reptilian foot-prints are said to have been found on 

 flagstone of this division (in the Chase formation) at 

 Wintield.* 



THE SUMNER DIVISION. 



Succeeding the Flint Hills division is the Sumner. 

 The rocks of this division are largely shales. The lime- 

 stones are thinner, less frequent, and more impure than 

 those of the Flint Hills division, and as they pass more and 

 more deeply below the surface to the westward, they give 

 place gradually and at length almost wholly to argillaceous 

 shales and rock-salt. The division includes many local 

 beds of gypsum and some of dolomite. 



The records of the prospector's drill show for the 

 Sumner division a thickness of about 600 feet at Caldwell 

 and of about Soo at Anthony. 



In this division, just before the disappearance of all 

 fossils from the Paleozoic rocks of Kansas, a strictly 

 Permian fauna makes its appearance. 



THE GEUDA SALT MEASURES. 



In the vicinity of Arkansas City, the southwesterly- 

 dipping, brachiopod-charged limestones and shales of the 

 Chase formation disappear beneath a salt-bearing formation 

 of great commercial importance. 



The Permian rocks of Kansas and Oklahoma include 

 two extensive rock-salt-bearing formations, the loiver and 

 the upper silt-measures, belonging, one in the Big Blue, 



*The proprietor of one of the quarries at Winfield once informed 

 the writer that, in quarrying Hapstonp for jxiviDg-, his workmen re- 

 moved a lari^e slab covered with rejjtilian footprints. The slab was 

 cut into paveraent-l>locks and shipped, contrary to orders, and so loBt 

 sight of, it having- been the owner's intention to preserve it in the 

 interest of science. 



