Lower Cretaceous of Kansas. — Gojild. 17 
The Cheyenne sandstone consists of two general divisions 
which, however, are not in all places sharply marked. The 
loW'Cr part is usually rather fine grained, soft, variegated, 
grayish or yellowish, more or less cross-bedded sandstone 
containing, in many places, smooth, water-w'orn pebbles of 
quartz, clay, granite, etc. These are sometimes as large as 
hens' eggs but are usually much smaller. The same kind of 
pebbles is often seen in pockets on the Red-beds where un- 
conformity is shown. The sandstone also contains occasional 
lenticular masses of soft bluish clay or shale and sometimes 
lignite or other carbonaceous matter. The thickness probably 
nowhere exceeds fifty feet, and the entire horizon is apparently 
wanting in places. This is professor Hill's No. I and professor 
Cragin's Corral sandstone. 
The upper part of the Cheyenne is composed of alternating 
layers of sandstone, sandy shale, and hard argillaceous shales 
arranged*without similarity of position. The sandstone is 
in places as firm as the Corral and is usually more variegated. 
The colors pass from gray and light yellow through various 
shades of yellow, pink and brown to black. It is nearly always 
distinctly stratified and often tilted at an angle of as much 
as thirty degrees. Between the sandstone layers are often 
found beds of sandy shale varying in color from light brown to 
almost black. The dark color is due to the amount of carbon- 
aceous matter contained and not as m the case of the harder 
sandstone to the presence of iron. Interspersed among the 
sandstone, sometimes in pockets but usually in larger areas, 
is the argillaceous shale. Sometimes it lies on the Corral and 
again it is separated from it by several feet of other sand- 
stone. It consists for the most part of sleek, light blue or slate 
colored, heavy, apparently unstratified masses, totally barren 
of fossils as far as known. Sometimes a band of this shale 
between two layers of sandstone will run at an angle of twenty 
to thirty degrees from the Corral to the overlying Kiowa. In 
many places it is wanting while in others it occupies nearly all 
the Cheyenne above the Corral. 
This is the part that corresponds to professor Hill's Nos. 2 
and 3 or professor Cragin's Lanphier and Stokes. That these 
names may and do apply in the limited area where professor 
Hill made his section and where professor Cragin obtained 
