Permian Formations of Kansas— Prosser. 
155 
terns was drawn at the base of the Wreford limestone or 
lowest formation of the Chase stage. It will be seen that 
this correlation agrees very closely with that of Dr. Tscher- 
nyschew, since he draws the homotaxial line representing 
the separation of the Russian upper Carboniferous and 
Permo-Carboniferous either at the base or in the lower part 
of the Chase stage. 
The following table from Dr. Tschernyschew's Memoir 
gives his idea regarding the correlation of the Russian and 
American formations : 
Ural and Timan 
of Russia. 
Texas and 
Arkansas 
Kansas, Nebraska, I.owa, 
Missouri 
Artinsk — ■ 
Ablagerungen . . 
Wichita and 
Clear Fork beds. 
Marion beds. 
Chase beds. 
Neosho beds. 
Schwagerinen — 
Albany and 
Cora — Hori- 
Canyon and 
Strawn beds .... 
tonwood beds of Kansas and 
Nebraska. 
Wabaunsee beds, Oread lime- 
stone and Osage shales of 
Kansas.* 
Several geologists have in a general way correlated the 
Wichita division of Texas with the lower Permian of Kan- 
sas and professor Cummins has stated that : 
"It is quite certain that the Ft. Riley horizon is the same as the 
Wichita division of Texas, and is at the very top of the division."* 
Dr. Kayser puts the Wichita in the Permian and has 
recently written as follows concerning its correlation : 
In the southern and western states (Texas, Kansas, Nebraska, 
&c) occur directly above and in intimate connection with the marine 
Upper Carboniferous principally sandy, slaty, chalky strata, the so- 
called Wichita beds. These contain in their lower division numer- 
ous Theriodonts (Naosaurus), Stegocephs (Eryops, Cricotus) and 
fishes (Pleur acanthus, Janassa, etc.) recognized by Cope long since 
as Permian; in the upper division besides numerous mostly Carbon- 
iferous species (especially of the Brachiopods — Productus, Margini- 
iera, Camarophona, Spirifera, etc. — Lamellibranchs, Gastropods) 
Permian Ammonites (Mediicottia, Popanoceras, Waagenoceras) . 
Above, follows as representative of the upper Permian a predomi- 
* /did. p. 395 of Russian and 706 of German text. 
* Trans. Texas Acad. Science, vol. ii, 1897. p. 98. For a summary of 
the various opinions regarding the correlation of the Kansas and Texas 
beds see Jour. Geo!., vol. x, 1902. pp. 724-727. 
