652 WHITMAN CROSS 
Statement of new observations.—In the Grand River Valley a deep 
red sandstone, which is clearly the Vermilion Cliff, occurs everywhere 
in its appropriate place beneath the White Cliff or La Plata sandstone. 
It was first noted by us in the canyon which appears to be the Cafion 
Colorado of Newberry, where it presents the aspect shown in Fig. 7— 
the point of view being within a few yards of that of Fig. 6. The 
massive wall of this canyon is of a fine-grained, dull, deep-red sand- 
stone, about 200 feet in thickness. The thinner-bedded strata, seen 
in the view above the massive portions, are of a similiar dark-red 
color. The basal beds of the La Plata are represented in the knoll 
on the sky line at the left hand. 
The dark-red sandstone seen in the gorge of Fig. 7 has ample 
opportunity to display its cliff-making capacity in the Grand River 
Valley, as illustrated in the views of Figs. 8and 9. ‘The massive sand- 
stone is there seldom more than 200 (?) feet thick, but a vertical 
jointing, common in the formation, leads to vertical cliffs in many 
places. As noted by Powell and Dutton the more massive part is 
almost always overlain by about too feet of beds of nearly identical 
character except for the thin-bedding and local tendency to shaly 
development. Similar strata underlie the cliff-making portion of 
the formation, as seen in Figs. 8 and 9. 
Not more than too feet below the cliff sandstone there occurs on 
Grand River a thin conglomerate, chiefly of limestone, carrying spar- 
ingly, but constantly, fragments of bones and teeth of belodont crocodi- 
lean or dinosaurian animals. Both in details of character of the 
conglomerate and of the fossils it carries, as well as in stratigraphic 
position, this stratum is clearly identical with that at the base of the 
Dolores formation in the San Juan region. It is present in corre- 
sponding position wherever we examined sections carefully, near 
Moab, in the Grand River Canyon some miles above Moab, on the 
north slope of the La Sal Mountains, in Paradox Valley, and on West 
Creek. 
The assertion that the fauna contained in the Triassic beds of 
Grand River is identical with that occurring in the Dolores formation 
of Colorado is frankly not supported positively by a large amount of 
evidence in the form of identifiable fossils. On the east side of Grand 
River near the road to the ferry, Mr. Kay obtained a vertebra con- 
