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National Park - Explosion Crater
of sign - East Entrance Road/US 14 in Yellowstone National
taken June 2008
up view of sign
view of sign
water disguises the site of a hydrothermal blowout. Imagine the scene:
tons of rock, steam, and boiling water exploding in the
leaving the crater that became the Indian Pond.
instant of geologic catastrophe left lasting marks on the
landscape. Hardly a typical pond, this hollow is deeper than
of the force of the blast. A rim of explosion debris encircles
the shore. The area remains thermally active, with
visible Steamboat Point.
of Yellowstone's thermal systems release steam gradually, bubbling
and hissing through geyser vents. Here, the eruption
the same chain reaction as a geyser - hot subterranean ground
water flashing to steam so violently that it blasted out
of feet of overlaying rock.
least ten other hydrothermal craters 50 to 5000 feet wide have
been discovered in the park.
on the sign
to the text there is a graphical picture describing the explosion crater and
an inset map that locates the crater in the park.
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