170 University of Kansas Geological Survey. 
these Tertiary-capped buttes, and near the left hand side of the 
picture, is a flat-topped mound not covered by Tertiary, but showing 
only the Red-Beds. 
To the northwest of Mount Nebo where the top of the Reds is 
exposed on Spring creek, is a massive, light gray sandstone 4 feet in 
thickness resting on the Reds. This sandstone is supposed to rep- 
resent the heavy-bedded stratum called the Big Basin sandstone. 
At this locality there is a decided dip to the southeast, as shown by 
the outcrop of the sandstone in question along the west side of 
Spring creek. The Comancheruns around the edge of thehigh prairie 
to the northwest of Mt. Nebo and Spring creek crossing Kiger creek 
considerably farther north than the Big basin. On this part of 
Kiger creek some years since, the black shale of the Kiowa was mis- 
taken for coal, and a well was drilled which according to Mr. Funk 
began near the top of the black shales, passed through from 35 
- to £0 feet of the same and stopped in the Red-Beds at a depth of 80 
feet fom the surface. On the west side of Kiger creek at Mr. Funk’s 
about one half mile northeast of St Jacob’s well, the base of the 
Kiowa shales is shown about 30 feet above creek level and have a 
thickness here of between 35 and 40 feet. Higher are prominent 
ledges of Tertiary rocks, the lower part consisting of coarse sand- 
stone. 
On reaching the upland to the northwest, the prairie appears to 
be comparatively level for a long distance. A short distance, how- 
ever, to the westward a marked depression is reached, resembling 
an immense sink-hole. On the northern side of this depression is a 
large and deep spring known as St. Jacob’s well. This locality is 
noted on the Ashland topographic sheet near the center of its west- 
ern edge. The depression is known as Little Basin on account of its 
basin-like form and seems to be in the axis of a synclinal fold. On 
the eastern side of Little Basin the rocks belong to the Tertiary. 
On the western side the Tertiary with steep easterly dip forms the 
upper part of the cliffs, having below it 28 feet of Kiowa shales that 
in turn are underlain by 10 feet of sandstone resting upon the sub- 
jacent Red-Bbeds. 
