ProsseR.| Cretaceous.—Comanche Series of Kansas. L337 
No. Feet. 
yellowish color forming the upper part of the 
Kiowa. Near the bottom blackish shales. 
2. Top of Cheyenne sandstone. Coarse sandstone in 43— 43 
general with the characters of the Cheyenne. 
1. Top of Red Bluff sandstone. 
In the above section the Cheyenne sandstone has as great a 
thickness as in the Belvidere region to the northwest; but the Kiowa 
chales have decreased from 120-130 feet to 34 feet. Perhaps this 
section shows a decrease in the actual thickness of the Kiowa de- 
posits, for the coarser shales of the upper Kiowa form a considerable 
portion of the upper 34 feet, so that the black shales of the lower 
part of the Kiowa do not have a thickness corresponding to that 
found in the more northwesterly sections. If this be true it shows 
that the decrease in thickness of the Kiowa is due only in part, at 
least, to pre-Tertiary erosion and in part to thinning of the sedi- 
ments. This decrease is shown still more strikingly in the south- 
west branch of Bear creek, northern part of Deer Head township, 
Barber county. This locality is six miles southeast of the one just 
described at the head of Elk creek, and three miles west of north 
of Deer Head post-office. 
Section at Head of Bear Creek. 
No. Feet. 
4. Top of level prairie occasional exposures of Tertiary marl, 60 
3. Loose Gryphaea shells in soil from thin shale exposed in 
places. Thickness indeterminate. 
2. Coarse gray sandstone of the Cheyenne................ 21 
1. Top of Red-Beds. 
The above section shows a decided thinning of the Comanche 
series in a straight line six miles to the southeast. It is probable 
that former erosion has swept away nearly, if not quite all, of the 
Kiowa shales and perhaps a part of the Cheyenne, so that the Co- 
manche series is represented by only about 21 feet. Across the 
divide to the southwest of this locality the Comanche series is found 
reduced to a thickness of perhaps 15 feet. Ona hill-about five miles 
northwest of Deer Head the Comanche shells occur in the shale 
between the Tertiary marl and the top of the Red-Beds. In places 
tne Cheyenne sandstone is visible and below are the reddish sand- 
