Stratigraphy of Kansas Permian — Beede and Sellards. 109 
Winfield limestone and that the remainder should be assigned 
to the Doyle shales while the limestone east of the Walnut 
probably represents the Fort Riley limestone. However this 
is merely a guess and the stratigraphy will have to be worked 
out before the matter can be settled definitely. 
CONCLUSION. 
From what has preceded it will be seen that the strata 
of the lower Permian are remarkably persistent and uniforrn 
when the great extent of the outcrop is considered. The 
Cottonwood limestone, though only about six feet thick per- 
sists with every detail of structure and fauna over one-hun- 
dred miles of strike and several times as great an outcrop,, 
though it has not been identified with certainty in the south- 
ern part of the state. The Garrison formation extends en- 
tirely across the state with but slight modifications in the 
southern part, such as the thickening of some of its lime- 
stones and the possible interpolation of others. The Wre- 
ford limestone is remarkably uniform throughout the entire 
distance from Nebraska to the southern line of Kansas, be- 
ing most highly developed in the central part of its outcrop 
in the region of Cottonwood Falls. In the Matfield shales 
about the only change worthy of special notice is the thick- 
ening of a layer of limestone and the coming in of an ad- 
ditional one in the southern part of its outcrop. There are 
no striking changes in the Florence flint aside from a slight 
fluctuation in its thickness, being somewhat thicker in the 
central and southern regions. 
Three maps have been published which show either in 
part, or in a general way the whole outcrop of the Wreford 
limestone and associated strata in Kansas. The first was 
published by Beede* and shows the outcrop, in a general way 
of the Cottonwood formation, Neosho, Chase and Marion 
stages in the region north of the Kansas river. The line be- 
tween the Neosho and Chase stages is the line of outcrop 
of the Wreford limestone. 
The second was published by George I. Adams in an 
article entitled "Physiographic divisions of Kansast and 
shows in a very general way the location of the "Flint Hills 
* Kans. Univ. Quart., ix, pi. xliii, 1900. 
