Geology and Mineralogy. 67 
ary of the Markagunt uplift (the ee making at one 
place a displacement of 5,000 feet, and at the southwest base 
of the Markagunt elevation, mate up the Carboniferous to a 
level with the Tertiary, a displacement of 12,000 to 13,000 feet. 
It reaches north to the west side of the Tushar plateau and by 
the east side of the Pavant. Other faults have less extent, but 
there is great similarity among them in character and direction. 
The amount of throw is, in general, from a few hundred feet to 
3,000 feet. The time when these displacements took place is not 
indicated by ne displaced beds, no beds occur later than 
ments. After that cow a ‘large part of the Roc iy Mountains 
e 
mononclinal flexures and nearly horizontal bedding of the Plateau 
mountain region and the hi h di s and numerous folds of the 
Appalachians. The contrast is ndt so striking when the compari- 
son is made with the Cumberland Table Land and its continuation 
southwestward into Tennessee and northward into Southern New 
York and the Catskills, which are parts of the results of the Appa- 
lachian revolution ; and may it not be that the High Plateaus are in 
a similar way the denuded outskirts of the Wahsatch, which after- 
ward became somewhat crumpled and poe while the uplift 
of the Rocky Mountain region was in 
The subject of erosion is treated ably ena with full appreciation 
of the grandeur and geological interest of the results in this Pla- 
teau region; and several areas a8 represent some of the won- 
derful scenes in the mountai author estimates that on an 
average, at at 6,000 feet of faite wnt “depth have been removed 
the dinioeies and subsequent time—from an area of 10,000 square 
i ra, 
say that the terms Miocene and Puck cad maine o de finitiot 
events occurring outside the province. We have only a vast 
stretch of time, Sith: an initial epoch near the vie of the local 
