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National Park - Grand Geyser
of sign - Upper Geyser Basin near Old Faithful in Yellowstone National Park
taken June 2008
view of sign
view of sign
World's Tallest Predictable Geyser
for the height and beauty of its eruptions, Grand Geyser's activity is linked
with that of nearby geysers. An intricate
of events that takes place over 7 to 15 hours culminates in explosions of
boiling water and steam from Grand's pool.
full eruption can last from 9 to 12 minutes and reach heights of 180 feet or
Geyser is a fountain-type geyser.
eruptions occur in one or more bursts from its crater or pool. There is
a short wait between bursts.
Geyser erupts every 15-22 minutes. Grand erupts at the onset of one of
prominent sinter bowl next to Grand Geyser is Turban Geyser. A small
crack left of Turban's sinter shoulder is Vent Geyser.
three geysers share a subterranean source of hot water.
Geyser erupts more frequently than the other two. Grand will erupt just
before or after Turban erupts. The water level in
fluctuates with each Turban eruption, usually dropping noticeably. As
an eruption of Grand Geyser nears, boiling water
over the rim of its pool. Within seconds, Grand will erupt.
Finally, Vent Geyser comes to life, jetting water to heights of 75
Though Grand's eruptions last only about 10 minutes, Vent and Turban can
continue to erupt for an hour or more.
exhibit made possible by a generous grant from the Yellowstone Association.
on the sign
to the text there is a picture of Grand Geyser erupting, a picture of its
vent and a background picture of Vent Geyser,
Geyser and Turban Geyser.
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