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Welcome
to Point of Interest Road
Signs! A
collection of photos of road and trail signs. Click
here for more Wyoming Signs
Sherman Mountains
Location
of sign - Located in the median of Interstate 80 between
Cheyenne and Laramie.
Photo
taken July 2007
Photo
courtesy of Jimmy Wayne
Text
of sign:
Sherman
Mountains
The
Sherman Mountains are erosional remnants rising above the general surface of
the Laramie Range. The flat topped
characteristic
of the range resulted from beveling during an ancient erosion cycle.
Bedrock here is made of pink feldspar, glassy
quartz,
black mica and hornblende, which originated deep in the earth's crust over a
billion years ago.
The
peculiar rock forms of the Sherman Mountains are controlled by three
sets of joints, or planes of weakness, cutting the granite
and
dividing it into large blocks. Weathering has rounded off
corners and has enlarged joint planes, resulting in irregular
blocky
rock
masses, many of which are capped by balanced rocks.
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