158 University of Kansas Geological Survey. 
by Tertiary rocks, separating Hackberry and Bluff creeks on the 
north from Day, Bear and Sandy creeks on the south, extends from 
near the head of Hackberry creek in a southeasterly direction for a 
distance of fifteen miles. The elevation of this divide varies from 
perhaps more than 2500 feet A. T. near the head of Hackberry creek 
te 2300 in a Tertiary capped butte rear the southeastern extremity 
of the divide. About six miles southeast of Messing’s house is a 
prominent point on the ridge just described known as Mount Jesus, 
which is on Section 11, Township 32 S., Range 22 W. In the de- 
pression between the above mentioned butte and Mt. Jesus the 
Tertiary rock has been removed by erosion, the highest part of the 
ridge at present showing only rocks belonging to the Kiowa. Ina 
creek heading in the northeastern slope of this mountain, the Day 
Creek dolomite forms a conspicuous stratum at an elevation of 131 
feet above the level of Bluff creek. In the immediate vicinity there 
is evidence that the Kiowa was deposited upon an irregular sea- 
bottom. At only a short distance from the locality where the Day 
Creek dolomite is so well exposed, there is an exposure of the Kiowa 
resting upon the Red Beds; but at places both the Hackberry shales 
and Day Creek dolomite are eroded so that the Kiowa shales rest 
upon the upper part of the Red Bluff sandstone at a position which is 
of course below the horizon of the Day Creek dolomite. Professor 
St. John in his early exploration of southwest Kansas also men- 
tioned the uneven bed upon which the Cretaceous formation was 
deposited, his description of this region being as follows: ‘The for- 
mation [Red-Beds] was also subjected to extensive denudation, as 
evidenced in the apparent uneven surface upon which the more re- 
eent Cretaceous formation was deposited, and in piaces it has re- 
ceived even late Tertiary deposits. In the region of Bluff creek, 
the base of the Cretaceous deposits varies in level more than 100 
feet. On Sand creek, three miles northeast of Lexington, the latter 
formation appears at a level nearly 120 feet lower than its base on 
Cat creek, seven miles to the west. In the south slope of Mt. Look- 
out, south of Blutf creek, the Cretaceous deposits are very nearly 
level with the exposures on Cat creek, and they occur within 50 
feet of the upper limestone of the Red-Bed series.”! At the base of 
1 Fifth Biennial Report Kansas State Board of Agriculture, Pt. II, p. 142. 
