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of sign - Grand Teton National Park - Teton Park Road
taken May 2008
view of sign
view of sign
Restless and Still Rising
Geologic Time these mountains are the energetic teenagers of the Rocky
Mountain chain: active, growing, yet sculpted by
Rise of the Range
million years ago, the earth's crust broke into two rectangular blocks along
the Teton Fault, a 40-mile-long zone of weakness.
sporadic movements, the western block hinged skyward to become the Teton
Range, while the eastern block tilted
to form the valley called Jackson Hole. The valley sank four times more
than the mountains rose. Displacement
and an earthquake-producing movement along the fault can occur at any time.
forces continually shape the rising mountains. Wind, water, ice and
glaciers, particularly of the last Ice Age, shaped
range into today's skyline. The sedimentary rock layers that covered the
central peaks have been worn away, but mountain
continues, counteracting erosion.
of graphics on sign:
addition to the text the sign displays a view of the Teton Mountain range
pointing out the location of Symmetry Spire, Mt. St.
Rockchuck Peak, Mt. Woodring, Thor Peak, Mt. Moran, Leigh Lake, Bivouac Peak
and Eagles Rest Peak. It also
a computer generated graphic of the Tetons Range as viewed from 3500 feet
about the sign that graphically explains the
of the Teton Range.
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