DAVIS: THE WASATCH, CANYON, AND HOUSE RANGES. 43 
Slate colored cliffs in the escarpments of the Swazy and Smoothback 
Masses, the middle members are largely shales, containing Agnostus 
and Discina, and the upper members are strong grayish limestones 
which form Swazy peak and (if our identifications are correct) the 
knobs of the Sawtooth range. The total thickness of the series must 
be 4,000 or 5,000 feet at least. With more time for observation, this 
Fig. 20.— Looking southward across part of the granitic highland of the Saw- 
tooth mass to one of the escarpments of the overlying strata (middle shales). 
The escarpment of the upper gray limestones is in the distance on the left. 
rough statement of the rock series might have been greatly refined; 
as it stands it is undoubtedly open to corrections from whoever can 
examine the range more thoroughly. 
The Swazy mass is a simple monocline, dipping eastward 5° or 10°, 
as illustrated in figure 18. The gray-and-slate colored limestones 
make the bold promontories west of the peak and as far northward as 
Fia 21.— The western escarpment of the Sawtooth mass, with ragged granitic 
spurs and the great fan of Painters ravine in the center. The cliffs of the up- 
per gray limestones descend from the cliffed peaks southward (to the right). 
we could trace them from a good view point. Here and far to the 
north the eastward dip of the strata might account for the north-south 
trend of the range, for its bold west-facing escarpment, and for its 
moderate eastward slope, under the action of long continued ero- 
sion alone and without block faulting, provided that a body of weak 
