DAVIS: MOUNTAIN RANGES OF THE GREAT BASIN. 157 
these features is at the southern end of the Provo Wahsatch, northeast 
of Springville, Plate 3, B, where the base line curves from south to 
southeast. Several ravines furrow the mountain face, dividing it into a 
number of subparallel spurs, all of which are cut off by rather well de- 
fined triangular facets. If these facets are explained as shore-line cliffs, 
rock platforms should stretch from a quarter to a half mile forward from 
the cliff base into the plain: but no such platforms are to be seen. If 
any rock platform exists, it must be supposed that it was cut at a much 
lower level than that of the Bonneville shore line, and that it is buried 
under the sands and clays that cover the low ground: but the existence 
of a wave-cut platform at such a depth is inconsistent with the opening 
of the ravines in the mountain flank several hundred feet above the 
plain; the ravines would necessarily have been deepened by their 
streams as the cliffs and platforms were cut back by the waves ; hence 
the supposition of a wave-cut origin for the facets cannot be favorably 
entertained: an origin by faulting is much more reasonable. It is 
noticeable that the stream lines in this part of the Wahsatch pitch with 
increasing steepness in the narrow gorge-like mouths of the ravines, 
thus hurrying between a gentler but still steep descent down the ravines 
in the mountain flank above, and a gentler descent through the Bonne- 
ville gravels on the way to the plain below. Indeed, the gorge-like 
mouths of the ravines seem to be incised somewhat below the base of a 
series of simply triangular facets, so as to give the spur sections the be- 
ginning of a house-end pattern, as if the faulting of the mountain block 
had been locally accelerated not long ago. The features of this interest- 
ing locality would well repay a detailed study. 
True wave-cut cliffs and their correlated rock-platforms may, as is well 
known, be seen at various points on the Bonneville shore line, but the 
cliffs are usually of much less height than that of the spur-facets in the 
Wahsatch front ; and in no case had the rock-platforms that I saw nearly 
so great a breadth as would be demanded by the forward prolongation 
of the facetted Wahsatch spurs so that the slope of the spur crest-line 
should descend to the platform level. The facets of the Spanish Wah- 
satch front the basin of Utah lake, not over twenty-five miles broad from 
east to west: the Bonneville waters here must have been much less 
powerful than in their more open areas further north; yet these facets 
are much larger than the true wave-cut cliffs that are seen on more ex- 
posed parts of the old shore line. The best facets of the Ogden Wah- 
satch, above-mentioned as lying close to by Weber canyon, cannot have 
been much affected by the Bonneville waves, for during much of Bonne- 
