718 CHARLES S. PROSSER 



tion. 1 In the southern part of the state the upper portion of the 

 formation consists to a large extent of clay-shales of various 

 colors, with some beds of limestone, gypsum, and rock salt. 

 Its lithologic character, as it dips deeply below the surface to 

 the westward, is shown by the well records to change from the 

 variegated shales alternating with beds of limestone and gypsum 

 to saliferous shales of bluish-gray to slate color alternating with 

 massive beds of rock salt. It covers a large portion of the 

 eastern two-thirds of Marion county, its lower part is quite well 

 shown in the vicinity of the city of Marion, and for these reasons 

 it was given the name " Marion formation." 2 On account of the 

 terms "Marion flint" and "Marion concretionary limestone," 

 Professor Cragin,in 1896, named this formation the " Geuda Salt- 

 measures," from Geuda, Sumner county, 3 which name he with- 

 drew during that year in favor of the " Marion formation." 4 



Wellington shales. — This formation consists largely of bluish- 

 gray to slate-colored shales, but contains some red ones, and in 

 the southern part of the state beds of impure limestone and cal- 

 careous shales, together with occasional beds of gypsum and 

 dolomite. Limited saline deposits are reported, but no rock 

 salt. Fossils are very rare, and, as far as the writer is informed, 

 none have been found in the formation. In the Smoky Hill 

 valley there are about two hundred feet of the Wellington shales, 

 but they thicken to the south, and are reported as 450 feet in 

 thickness in Sumner county, near the southern line of the state. 

 Professor Cragin named and described these shales in 1896 from 

 exposures in the vicinity of Wellington, the county seat of 

 Sumner county. 5 



TABLE OF THE UPPER PALEOZOIC FORMATIONS OF KANSAS. 



The formations just described, together with the succeeding 

 ones of the Permian, have been arranged in the following table 

 of the Upper Paleozoic formations of Kansas. 



1 See Dr. Grimsley's account in Univ. Geol. Surv. Kan., Vol. V, 1899, p. 69. 



2 Jour. Geol., Vol. Ill, 1895, p. 786. 



3 Col. Coll. Studies, Vol. VI, March, 1896, pp. 3, 9-16. 



'■Am. Geol, Vol. XVIII, Aug., 1896, p. 132. 



5 Col, Coll. Studies, Vol. VI, pp. 3, 16. 



