174 University of Kansas Geological Survey. 
in 1894 in his paper entitled “A Geological Reconnaissance in 
Southwest Kansas and No Man’s Land.’! Mr. Case stated that 
“Following the line of the Tertiary northward we find in the neigh- 
borhood of Ashland and Vesta, in Clark county, that the Cheyenne 
or Comanche Cretaceous separates very indistinctly the Tertiary 
from the Triassic. It is represented by a yellow sandstone growing 
thicker towards the east and filled in places with shells. Above 
this is a layer of clayey soapstone, so called, also thickening towards 
the east. This increases in thickness from a few feet at Vesta to 
nearly 30, a mile east. The outcrop of the Cretaceous is nowhere 
more than a quarter of a mile wide and is Coe maT obliterated 
both by the Triassic and the Tertiary.” 
DISCUSSION OF THE SECTIONS. 
An examination of the general sections accompanying this re- 
port conveys a graphic idea of the broken nature of the country /in 
Barber, Comanche and Clark counties. They also clearly illustrate 
the thickening and thinning of the Comanche series in this region, 
and show in a striking manner the erosion following the close of 
the Red-Beds before the deposition of the Comanche, and ‘the 
second great erosion after the deposition of the Comanche and be- 
fore the Tertiary was deposited. This erosion has been described 
by earlier writers in a general way, particularly by Professors 
Hay and Hill but probably it has never been as markedly shown 
for any part of Kansas as in the region just described. 
On referring to the section across southern Kansas, Plate 
XXX VIIL., it will be seen that the top of the Medicine Lodge gypsum 
is alinost horizontal from the top of the Gypsum hills, six miles south- 
west of Medicine Lodge, to the bluff west of Sun City. On the Gyp- 
sum Hills it is 1800 feet A. T. according to the Medicine Lodge topo- 
graphic sheet of the U. 8S. Survey, and on the hill west of Sun City, 
nearly twenty two miles northwest of the former place, it has about 
the same elevation, 1805 of our section which agrees closely with 
the topographic sheet. In the Walker creek four miles to the north- 
west of the Sun City bluffs, the top of the gypsum is some 15 to 20 
1 EK. C. Case, Kansas University Quarterly, Vol. II, pp. 148-148. Lawrence. 
2 Ibid., p. 146. 
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