462 J. W. Powell— Geological Structure of the country 
latter is broken, and where the drop of the fault is to the west, 
the line of cliffs on the western side of the fault is thrown to 
the south, to a distance which is in direct ratio to the extent of 
the drop. 
The bearing of these facts, in the study of the conditions 
under which these cliffs were formed, is very interesting, but I 
may not stop to discuss it farther here. 
The lines of cliffs which are formed by the north and south 
faults are of much more regular outline, and are more rarely 
crossed by cafions, yet, in a few places they are thus cut by 
channels of streams. In some places these streams, in crossing 
the fault, run from the upper to the lower beds. In other places 
they run from the lower to the upper beds. 
The next group of topographical features in this country, 
consists of the plateaus, to some of which I have heretofore 
allud East of the Grand Wash Cliffs, and west of the long 
eafion valley at the foot of the Hurricane Cliffs, and north of 
Grand Cafion, and south of a short abrupt fold that can_be 
seen to extend between the two faults a little south of Fort 
Pierce, there is a great table, its surface having an inclination 
to the northwest, determined by the grand dip of the rocks to 
the north, and the local dip to the east, which is due to the 
faulting. To this we have given the name Shedy-wits Plateau. 
Between the Eastern and Western Kaibab Faults there 1s an 
extensive plateau, extending from the Grand Cafion to the foot 
of the Vermilion Cliffs; the Indian name for this is Kaibab, 
meaning, Mountain lying down, and pleased with its significance, 
we have adopted the name Kaibab Plateau. 
A triangular table of Triassic sandstone is seen between the 
Colorado, the Paria, and House Rock Valley ; for this we have 
adapted the Indian name, Un-kar Kaiv-dav-i. The Indian name 
for the plateau east of the head-waters of the Sevier is Pouns- 
d-gunt, meaning, the Home of the Beaver; this name we have 
also adopted. The plateau west of the river they called Mar- 
i-gunt, Home of the flowering bushes; I hardly need add 
that we were pleased to adopt this name also. 
Through the great fissures of these faults floods of lava have 
: rom erosion, and thus table-mountains have been 
formed. In our earlier stu 
