130 University of Kansas Geological Survey. 
Comanche series in the Belvidere section which is believed to rep- 
resent nearly its maximum thickness in southern Kansas. Across 
a small ravine near the foot of the hill, for a distance of 30 yards, 
these shales show a noticeable southern dip. 
One mile above Belvidere on the northern side of the river, at 
the point of the ridge east of Thompson’s creek, is a commanding 
ledge of Cheyenne sandstone, known as Osage rock. The picture 
of the Osage Rock above Belvidere—Plate X VIII—gives very clearly 
the characteristic appearance of this rock which forms the end of 
the divide to the east of Thompson’s creek. This locality has historic 
interest on account of being the scene of a battle between the 
Cheyenne and Osage Indians. The main part of the rock is 20 feet 
high, capped by a pillar 5 feet in hight. 
Irom Belvidere the Comanche series was followed up Spring 
creek to the vicinity of Mr. Roberts’ house about three miles north 
of the station where along the sides of the creek are the upper 
black shales of the Kiowa, above which are the yellow and coarser 
KXKiowa shales. Still higher, the Tertiary sandstone is shown on the 
west side of the creek capped by ‘a calcareous deposit. A section 
on the west side of Spring creek just above Mr. Roberts’ house was 
levelled. 
Spring Creek Section. 
No. Meet: 
4, Near the top of the hill marl and calcareous deposit 
several feet in thickness. 
de COVER SLOPE iy ys N ar aN AeA al a veney a aol nea ane 15—78 
2. Coarse-grained pebbly sandstone ledge from 2 to 3 2-3—63 
feet in thickness. Base of Tertiary. 
1. Yellowish shales; near the bottom blackish shales 60—60 
to the level of Spring creek. Kiowa shales. 
From this locality the divide between Spring and Thompson’s 
creeks was crossed, all of which belongs to the Tertiary rocks. 
From the base of the Tertiary to the top of the Cheyenne sandstone 
on the eastern branch of Thompson’s creek, the difference in alti- 
tude is 120 feet and all the rocks belong to the Kiowa shales, making 
their thickness approximately the same as in the hill south of Bel- 
videre. The Gryphaea bed at the base of the Kiowa shales, on the 
hill north of the Medicine Lodge river at the mouth of Thompson’s 
