664 WHITMAN CROSS 
ences, the finer-grained material being reddish. At 25 feet above the 
granite the characteristic alternation of grit and conglomerate began. 
But the distribution of pebbles and bowlders is very irregular, the 
latter are often subangular, and the whole is so little consolidated that 
the disintegrated beds seem like surface gravels. Fig. 10 shows the 
appearance of the beds in the ravine in question. It is but a few 
hundred feet from this point to the contact which was seen. 
Fic. 11.—Looking southward across West Creek, Colorado, near mouth. Can- 
yon of Dolores River faintly outlined on right. The upper cliffs of view are caused by 
massive La Plata sandstone (Jurassic). Next lower cliffs and headlands on right are 
formed of Dolores or Vermilion Cliff Triassic sandstone. Below latter, section is 
that discussed on p. 667, and referred to Cutler Permian ( ?). 
Similar coarse conglomerates occur along the road on the north 
side of West Creek, seeming there like partially consolidated stream 
gravels, but examination shows them interbedded with finer grits 
of the series. 
At about 3 miles west of the granite line on the south side of West 
Creek, Mr. Woolsey measured the following section of sub-Triassic 
strata, the locality being below the central point seen in Fig. 11. 
