View to the
north-northwest with Salt Creek Canyon in the lower right
quadrant. Another fault crosses the Colorado River in the
middle of the picture with Quartermaster Canyon to the left
and Burnt Spring Canyon to the right.
Strata continue to slant downward to the north.
The Precambrian metamorphic and Tapeats Sandstone layers still
form a cliff next to the river at the lower edge, but these
layers will drop down out of sight shortly after Quartermaster
and Burnt Spring Canyons.
On the southwest side of the river there are
extensive travertine deposits that have cemented erosional
debris in place. Some of the travertine terraces appear very
similar to those at Mammoth Hot Springs in Yellowstone
View to the
north-northwest with Quartermaster Canyon in the lower left
and Burnt Spring Canyon in the lower right. Tincanebitts
Canyon enters from the upper right corner, and joins the
Colorado just before the river turns left.
Lower Granite Gorge (the inner gorge) comes to an
end when the Precambrian and Tapeats strata drop down below
river level shortly after Quartermaster and Burnt Springs
Canyons. The Bright Angel Shale has more sandstone in it than
it does further east in the canyon. As a result its slope
forming characteristics are not quite as pronounced, but it is
still a contrast to the limestone and Supai cliffs that still
rise more than 3,500 feet on both sides of the Colorado River.
The broken black line in the lower left is
Quartermaster Road and provides a spectacular viewpoint of the
river miles 248 to 256
to river miles 264 to 272
the Index Page for the Grand Canyon Tour
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