LAKAMI PEAINS RED BEDS AND: THEIR A GE Ai, 
bedded red sandstone, which rise from 20 to 75 feet above thc 
valley. These are occasionally consolidated into a wall with 
vertical sides, and this capped with grotesque figures altogether 
too complicated to admit of description here. The west winds 
cut notches, gaps, and in some places channels, to a depth of 
20 or more feet. There are isolated, irregular towers that rise 
from 50 to 75 feet, and in some instances these have been nearly 
undermined by the greater erosion at their base, and in a few 
places they are found already tumbled to the ground. On Sand 
Creek, and on the Colorado-Wyoming line, Chimney Rock, with 
its curious rugged exterior, rises to a height of 350 feet above 
the stream that flows at its base. 
The geological section that follows extends from the Archean 
mass east of Sand Creek, westward to and including Red Moun- 
tain, and has been constructed as follows: Nos. 1 to 44 inclu- 
sive, were measured on the eastern side of the formation. To 
the westward the gypsum and aragonite beds were found in the 
Payne ranch; but the thickness of the formation between the 
gypsum and No. 44 was not taken, nor were the Red Beds 
measured above the gypsum in this locality. Red Mountain has 
been faulted up so as to expose all of the Red Beds from below 
the gypsum beds upwards, and on account of the accessibility of 
this section the measurements from No. 44 upwards were taken 
at this point. Thetwo sections have not been accurately put 
together, since it was impossible with limited time to locate the 
upper portion of the first part of the section at Red Mountain. 
While at work during the last of November in the vicinity 
of Red Mountain, I discovered a fauna in the midst of the Red 
Beds, and to make its position clear I append the following 
section: 
GEOLOGICAL SECTION. 
Feet. Inches. 
Archean granite, badly decomposed, base of Red Beds - - 10 fo) 
1. Conglomerate, shading into coarse sandstone of a reddish-brown 
color - - - - : - - - - - - - I 6 
2. Fine grained reddish conglomerate and sandstone - - = 17 fo) 
3. Soft sandstone, shading from gray to red - - - - 25 4 
4. Whitish sandstone, with a few thin bands of red 6 
