SURVEY OF THE COLORADO OF THE WEST. 
11 
have heretofore been mapped as mountains, on the west; to the north it 
is lost in the Tu-sliar Mountains ; on the east it is bounded by the upper 
valley of the Sevier. Many of the western tributaries of this stream 
have their sources in this plateau ; it is also the source of the Rio Virgen. 
The Pauns-a'-gunt Plateau is on the eastern side of the upper course 
of the Sevier, and is bounded on the east, south, and west by lines of 
cliffs, and on the north by the canon of the East Fork of the Sevier, and 
is the source of one of the upper branches of this stream ; it is also the 
source of the Kanab and Paria. ( 
The Aquarius Plateau lies still farther to the northeast ; it is bounded 
on the south, east, and west by lines of cliff's and abrupt slopes, and on 
the north it is separated from the Wasatch Plateau by the canon of 
Salina Creek. Thousands of little lakes are scattered over its surface. 
These are the sources of the Escalante and Dirty Devil Rivers and the 
southern tributaries of the San Rafael. On its western margin many 
little streams head that are tributaries to the Sevier. All three of the 
last- mentioned plateaus carry on their backs extensive beds of lava and 
volcanic cones developed to such an extent as to produce groups of 
mountains. 
The Kai-'par-o-wits Plateau is a table land extending from the south 
east corner of the Aquarius Plateau nearly to the Colorado River oppo- 
site the mouth of the San Juan, and is bounded on all sides by lines of 
cliffs. 
The Colob Plateau lies to the southwest of the Mar-ka'-gunt. It is an 
extensive table-land traversed by deep, narrow canons through which the 
headwaters of the Rio Virgen find their way to a dosolate valley below. 
South of the Pauns-a'-gunt, Aquarius, and Kai-par-o-wits Plateaus and 
east of the Colob, there are a great number of smaller plateaus of which 
I will make no farther mention, but their positions have been well fixed 
and will be represented on the map. 
South of the Paria, and west of Marble Canon, is the Paria Plateau 
bounded by lines of cliffs on the south, east, and west, but on the north 
by the canon of the Paria River. 
The Kai-bab Plateau lies west of the Paria Plateau and the lower end 
of Marble Canon, and north of the Grand Canon. It is about seventy 
miles in length, and varies from five to thirty in breadth, and is bounded 
on all sides by steep slopes or bold escarpments. 
The Kanab Plateau is bounded on the east by the lower canon of the 
Kanab, on the south by the Grand Canon, on the west by the To-ro'-wip 
cliffs, and on the north by a low escarpment of basalt. The U-in-kar-et 
Plateau lies to the west of this, and is bounded on the east by the To-ro'- 
wip Valley and a basaltic escarpment, on the south by the Grand Canon, 
and on the west by the Hurricane Ledge; it runs to a point on the north. 
The Shi'-vwits Plateau is a terraced table-land; its southern extremity 
extends far into an angle of the Grand Canon : on the west it is bounded 
by a line of cliffs, on the north it descends by abrupt slopes into the 
