Stratigraphy of Kansas Permian — Beede and Sellards. 95 
respond to Hay's section, but would reduce the thickness 
of the Matfield formation an equal amount. Numbers 31 
to 37 of our section are Fort Riley limestone and show a 
thickness of at least 47^ feet of it exposed, with the prob- 
ability that much of Number 38 should be added. 
The region from Junction City to Cottonwood Falls 
has been well summarized by Prosser.* Taking the region 
as a whole he ascribes a thickness of 6 feet to the Cotton- 
wood limestone, 140 to 145 feet to the Garrison formation, 
40 feet to the Wreford limestone, 60 to 70 feet to the Mat- 
field formation, 20 feet to the Florence flint, 40 feet to the 
Fort Riley limestone, 60 feet to the Doyle shales and 20 to 
25 feet to the Winfield limestone. Detailed sections are 
given in the folio referred to. 
Southern Province. — South of the region represented in 
the Cottonwood Falls folio changes are to be noted in the 
appearance of some of the strata under consideration. South 
of the latitude of Bazaar, Chase Co., the Cottonwood lime- 
stone has never been definitely located nor its horizon accu- 
rately mapped. Keyes* states, referring to the Cottonwood 
limestone, that "its geographic range is wide, extending 
from Nebraska through central Kansas into Oklahoma." 
Again* "The stratum (Cottonwood limestone) has been 
traced from southeastern Nebraska where it passes beneath 
the Cretaceous, entirely across Kansas into Oklahoma. It 
often forms a noticeable topographic feature." The Cotton- 
wood limestone has never been traced across Kansas into 
Oklahoma unless it was done by Keyes himself. Indeed, 
as will be shown in the following discussion, it can not be 
recognized with certainty by any of its characters south of 
the region just mentioned. Other stratigraphic changes 
occur in the Garrison, Elmdale and intermediate formations 
so that the members can not be recognized readily by their 
lithologic characters and can only be determined by care- 
fully tracing the outcrops south from the known localities. 
One of the writers endeavored to locate the Cottonwood 
limestone in the southwest ^corner of Lyon county and tra- 
versed its general horizon to Reece but was unable to locate 
* Jour. Geol., iii, p. 773 and some of the preceeding pages. See also 
Cottonwood Palls Folio, U. S. Geol. Surv. Atlas, number 109. 
t Amer. Geol, xxiii. 1899, p. 303. 
t T>oc. cit. p. 311. 
