40 GUIDEBOOK OF THE WESTERN UNITED STATES. 
of Purgatory Creek he caught sight of Pikes Peak, far to the north. 
Pike, in his journal, calls 3 it the “Grand Peak.” He was fired with 
Just to the east of the gateway to 
the Garden of the Gods the gypsum 
layer of the Lykins formation is prom- 
inent. (See Pl. XIX.) This gypsum 
ration ypsu 
that it can be scratched by the finger 
ed in making wall plaster 
and as a fertilizer. The Morrison for- 
mation, which is made up chiefly o 
seen near Colorado City in the rail- 
road cut just east of Quarr 
This formation, which g 
huge reptiles, such as the Ceratopsia. 
One skeleton was found in the Garden 
of the Gods. This is the same band 
of rock in which remarkable reptilian 
remains were found west of Denver 
and north of Canon City. (See Pl. 
AAAI, Bp. 10.) 
To observe the outerops of the for- 
mations of Cretaceous age as high 
in the column as the Niobrara forma- 
tion it is necessary to leave the rail- 
road track just west of Colorado City 
and climb about 100 feet to the level 
of the gravel bench. These outcrops 
form perfectly velar pig ie 
associa with it. e eastern hog- 
back carries along its crest the sand- 
stone member of the Carlile formation 
and the overlying Niobrara limestone, 
which are also well exposed. 
The traveler should visit the mesa, 
the large mass of gravel overlying the 
Pierre shale in the V between Monu- 
ment and Fountain creeks. The is 
but one of many remnants, all sloping 
away from the mountains at much the 
eight, of a great deposit of 
Same he 
gravel which has been cut through by . 
v 
outh the flack crest of 
aces beets rises more than 
2, sed tary be 
thrust forward about 4 miles, s 
faulting movement the sedimentary 
rocks between suet and the south- 
ern end of Cheyenne Mountain were 
ey oe block of granite were car- 
ried up with 
Rg sae of the rocks in 
Mountains, which were b 
being by them, are therefore recent 
features in the geologi 
were probably raised up after the 
deposition of the Dawson arkose. 
