112 University of Kansas Geological Survey. 
CHEYENNE SANDSTONE. 
for the lower formation it is proposed to use the name Cheyenne 
sandstone which was first proposed by Professor Cragin in 1889! and 
well characterized by him a few months later’. This formation 
is composed mainly of a rather coarse-grained, friable sandstone, in 
general of yellowish-gray to whitish color, but frequently spotted 
and striped with bright colors as purple, crimson, brown, ete. In 
places it is conspicuously cross-bedded, as for example, in the 
arroyo a short distance south of Belvidere, termed by Professor 
Cragin, the Champion draw, as may be seen in the plate illustrating 
the Cheyenne sandstone at this locality, Plate X VIL 
The maximum thickness of the formation is in the Medicine 
Lodge region in the adjoining corners of Kiowa and Barber counties. 
Professor Cragin gives it as varying from about 40 to 65 feet;? Pro- 
fessor Hill’s section of the Black Hills gives a total of 71 feet for the 
Cheyenne,! while the writer’s measurements in this region give a 
thickness varying from 40 to about 55 feet. The outcrop of this 
formation is usually rugged. There are layers of variable thick- 
ness that have been more firmly cemented but, on account of the 
friable nature of the sandstone, the ledges have been carved by 
erosion into pillars, chimney rocks and other fantastic and striking 
forms. An interesting locality to visit for the purpose of observing 
these effects of erosion where may be seen a “chimney rock” and a 
number of small pillars is that which is known locally as Hell's 
Half Acre, in Comanche county near the Comanche-Barber county 
line, eight miles southeast of Belvidere, Plate XV. There are nu- 
merous exceilent exposures from the above locality toward Bel- 
videre, as in the “Natural corral” on the Lanphier claim five and 
one half miles southeast of Belvidere; along the bluffs of Walker 
creek; in the Champion draw near the foot of the hill south of 
Belvidere; and especially on the north side of the river above Bel- 
videre where the Osage rock forms a conspicuous landmark. An 
1 F. W. Cragin, Bulletin Washburn College Laboratory Natural History, Vol. II, 
December 1889, p. 65, Topeka. 
2 Ibid., March 1890, pp. 69-73. 
3. W. Cragin, American Geologist, Vol. XVI, pp. 366, ‘‘the corral sandstone 
is ordinarily 30 to 50 feet’’; 367, the Lanphier beds are ‘‘10 or 15 feet’’ and the “‘leaf- 
bearing Stokes sandstone, a few feet.’’ 
4 American Journal Science, 8d Series, Vol. L, pp. 207, 208. 
