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Signs! A
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Yellowstone
National Park - White Dome Geyser
Location
of sign - the Firehole Lake Drive in Yellowstone National Park
Photo
taken June 2008
Close-up
view of sign
Wide
view of sign
Text
of sign:
White
Dome Geyser
White
Dome Geyser's beautifully shaped cone is many centuries old and is still
growing with each eruption. For hundreds of years,
thermal
waters has been building the cone that you see today - one of the largest in
Yellowstone.
Formation
of a Cone
Splashing
and spraying during each eruption, thermal water is still building White
Dome. After travelling underground through silica-
rich
volcanic rhyolite, the water deposits silica as it splashes over the cone,
forming spiny, bulbous masses of geyserite. More and
more
bumps form on this gnarly, ancient cone as White Dome grows older and more
massive.
An
array of minerals and thermophiles-bacteria and algae that live in thermal
water - creates a tapestry of color around White
Dome's
vent.
Fountain
or Cone?
Fountain
Geysers
Fountain
Geysers, like Great Fountain Geyser behind you, erupt through a large vent
with a wide opening that can look like a hot
spring.
Water bursts in many directions.
Cone
Geysers
White
Dome and other cone geysers erupt in a narrow jet of water through a slim
vent, usually from a cone-shaped formation.
Graphics
on the sign
In addition
to the text there is a closeup picture of themaphiles and a larger picture of
White Dome Glacier.
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