Geysers
Geysers is what yellowstone is
known for - and not without reason. Three quarters
of the world's geysers can be found within this
area. They are driven by the huge super-volcanoe
that lies beneath the Park and they are a active-
very active! Some spout hot water and steam incessantly;
some vent themselves periodically (once or twice
and hour, several times a day, every couple of
weeks or months, or every year or so). Some lie
dormant for several years then suddenly burst
into violent wakefullness.
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