136 University of Kansas Geological Survey. 
creek are reached when it turns to a more westerly course appearing 
in the various branches forming the head-waters of the Nescatunga 
creek in the central part of Comanche county. Thence the outcrop 
is represented as a somewhat indefinite line a little further south, 
to the northeast of Avilla, running thence nearly northerly around 
tbe eastern branches of Cavalry creek, to the southwest of Cold- 
water, where it extends northwesterly to near the western part of 
Comanche county on the head-waters of Sand creek. 
To the southeast of Deer Head in the western part of Barber 
county these formations have greatly decreased in thickness 
although they may be readily followed around the loop and up the 
northern side of Mule creek valley as well as for some distance on its 
wcetern side. Beyond this locality there is in general only an occa- 
sional outcrop of the rock but loose specimens of the shells are of 
quite frequent occurrence in the draws, and have been taken as indi- 
cating the line of demarcation between the Tertiary and Red-Beds. 
Jt is probable that over some of this area the pre-Tertiary erosion 
has removed all of the Comanche and a portion of the upper part of 
the Red-Beds, so that the line indicated as the outcrop of the Co- 
manche does not represent the actual position of that series. The 
area denominated Kiowa-Barber-Comanche may be regarded as ter- 
minating to the southwest on the upper branches of Mule creek. 
The rapid thinning of the Comanche series in the northeastern 
part of Comanche and the western part of Barber counties to the 
southeast of the Stokes hill region is well shown by sections on the 
head-waters of several of the creeks of that region. One of these 
sections is the following near the Comanche-Barber county line, 
about a mile north of parallel 20° and about four miles east of 
south of Stokes hill, on the southwestern branch of Elk creek. 
Section at Head of Hlk Oreek. 
No. Feet. 
4, Top of level divide mainly covered, showing Tertiary 50—127 
marl in places. 
o. Top of Kiowa shales. <A little below the Tertiary 34— 77 
rocks plenty of Gryphaeas occur in the yellowish 
soil; and a little farther down the draw are large 
slabs of pinkish limestone and the coarse shales of 
