ANTHRACOLITHIC ROCKS OF KANSAS 129 



the Wreford limestone of the Chase stage.' This agreed quite 

 closely with the later correlation of Dr. Tschernyschew who drew 

 the line separating the homotaxial equivalents of the Russian 

 Upper Carboniferous and Permo-Carboniferous at the base or 

 in the lower part of the Chase stage. The following is a trans- 

 lation of Dr. Tschernyschew's views : The Neosho beds, and possibly 

 also the lower part of the Chase, appear analogous to the Russian 

 Schwagerina horizon [the Schwagerina beds form the upper division 

 of the unquestioned Upper Carboniferous of Russia, just below the 

 Artinsk] and the remainder of this, as well as the Marion beds, one 

 must consider as homotaxial with the Russian Permo-Carboniferous 

 and lower Permian. Finally, the Wellington and Cimarron beds may 

 correspond to the lower red-colored Permian in eastern and northern 

 Russia.^ 



More accurate inforrnation concerning the horizon of certain 

 vertebrates described by Dr. Williston from southern Kansas led 

 the writer in 1907 to suggest that perhaps the Cottonwood lime- 

 stone at the base of the Garrison formation, which is nearly the same 

 as the first provisional line, "is really nearer the line of division 

 between the Pennsylvanian and Permian than the Wreford limestone 

 at its top. "3 This line is from 140 to 145 feet lower than the base 

 of the Wreford limestone and about 14 feet lower than the line 

 suggested in my first paper on the classification of these rocks 

 in 1895.4 



When my earlier papers were written no fossils had been found 

 in the Cimarron series or Red Beds and in 1897 I stated that 

 "the correlation of these rocks with either the Triassic or Permian 

 is a matter of uncertainty." ^ In 1906 Doctors Gould and Beede 

 published an account of the discovery of Permian fossils in a sandstone 

 west of Alva, Oklahoma, the stratigraphic position of which was given 



^ Jour. Geol., Vol. X, Chart of "Classification of the Upper Paleozoic Forma- 

 tions of Kansas," opp. p. 718. 



2 Mem. comite geologique, Vol. XVI, No. 2, 1902, pp. 392, 393 of Russian text 

 and p. 703 of German text. For translation see Am. Geol., Vol. XXXVI, 1905, p. 154, 

 and Schuchert in Am. Jour. Svi., 4th ser., Vol. XXII, 1906, p. 38. 



3 Jour. Geol., Vol. XV, p. 823. 



4 Ibid., Vol. Ill, p. 800. 



s Univ. Geol. Surv. Kansas, Vol. II, p. 92. 



