DAVIS: THE WASATCH, CANYON, AND HOUSE RANGES. 19 
The ranchman told us that the canyon wind was a regular occurrence, 
and others said that it was on account of this wind that the district 
close about the mouth of the canyon was unoccupied. 
The Wasatch Front from Spanish Fork Canyon to Santaquin. The 
Spanish peak mass of the Wasatch stands to the east of the general 
line of the mountain front. The recession on the north is caused by 
an incurving of the base line at the southern end of the Provo mass, 
where the limestones that make the front and crest of that part of the 
range are all cut off in very suggestive fashion: the recession on the 
south is accompanied by the development of several well defined facets 
on the spurs that descend to the Bonneville delta of Spanish fork; 
these facets are conspicuous in the view from the line of the Rio 
Grande railroad, which passes near them on its way into Spanish 
fork canyon. The facets are especially large at the corner where the 
front of the range turns southward again, east of the village of Salem, 
and are shown at the left in figure 2. The question here arises again, 
RA 
E 
Fig. 2.— The Wasatch range, between the canyons of Spanish fork on the left 
and of Payson creek on the right; looking southeast. 
whether the large facets of this kind are due to erosion by Bonneville 
waves, or whether they are normal fault facets, more or less battered 
by weathering to a graded slope. ‘| is true that the facets at the cor- 
ner of the range are well situated to. «fective attack by the lake waves; 
yet there does not seem to be a broad, forward-reaching rock platform 
beneath the facets, such as should certainly be found if tapering spurs 
of pre-Bonneville erosion in a non-faulted mountain mass had been 
cut back by wave action. 
As the mountain front turns southwestward the facets become 
smaller, but they are easily recognized at the ends of many spurs along 
the mountain base for 8 miles to Payson canyon. In the latter half of 
this distance the base line of the mountain rises several hundred feet 
over the highest Bonneville shore line; yet even there recent fault 
scarps are seen in the outwashed piedmont gravels; hence the recent 
slips and scarps elsewhere seen in the Bonneville deltas at the Wasatch 
base line should not be ascribed only to the settlement of the delta 
