DAVIS: THE WASATCH, CANYON, AND HOUSE RANGES. 47 
which the northern border of the Sawtooth mass overlooks the oblique 
depression along the southern side of the Smoothback mass, should 
continue their course far to the southwest across the intermont basin, 
instead of being cut off obliquely about in line with the termination 
of the cliffs in the Smoothback mass, as in figure 22 (left end). Like- 
wise the heavy limestones that form the high knobs of the Sawtooth 
mass should continue with full height southwestward along their strike, 
instead of obliquely descending the face of the range to the basin level 
and ending in line with their truncated fellows. Far from exem- 
plifying the well determined laws that correlate the structure and 
the form of folded and normally eroded mountain masses, the various 
resistant members of the House range are all arbitrarily terminated 
on the north-south line of the west-facing escarpment; hence the es- 
carpment cannot be reasonably regarded as the result of normal retro- 
gression of a once much larger monoclinal mass; the termination 
of the strong mountain-making strata can be explained only by block 
faulting of a comparatively recent date. The oblique truncation of 
the rock series in the southern part of the range is therefore highly 
significant, and its explanation carries with it the explanation of the 
simpler escarpment farther north. 
The continuity of the escarpment across the granitic part of the Saw- 
tooth mass is less significant than was supposed when the granite was 
first seen in the distance; for a closer examination showed that the 
granite did not generally come forward to the face of the mountain, but 
was bordered by certain members of the normal series along the base 
of the range, as in Plate 3, B. Still several branches of the granite 
intrusion do come out to the base of the range and instead of making 
spurs are there terminated in line with the bedded rocks among which 
they are intruded. 
Whether the transverse faults near the two cross roads are finally 
shown to'exist or not, and whether, if proved to exist, they are of remote 
or of comparatively recent date are matters that do not bear on the 
problem here discussed; for the fault that is inferred along the western 
base of the range may cut older faults just as easily as it may cut older 
folds or monoclines or strata of any attitude. 
The displaced rock masses along the western or faulted base of the 
range are of importance. Several examples may be noted. One was 
seen at the western base below the high promontory west of Swazy 
peak, as sketched in figure 24; it should be compared with the more 
normal section in figure 18. A short distance south of the northern 
road an outcrop of gray limestone with a westward dip of 35° was seen 
