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The geyser
Old Faithful, in
Wyoming’s Yellowstone
National Park, erupts
every hour or two.
This mudpot is in the city
of Rotorua, New Zealand.
MUDPOTS
Bubbling pools of
hot mud are often
found near geysers.
They form where
boiling water mixes
with soil and clay.
The Steamboat Geyser in
Yellowstone National Park
sprays about 300 feet
(90 m) into the air.
Tallest geyser
GURGLING GEYSERS
A geyser forms when rainwater
soaks into the ground and is
heated by magma. If the water
gets hot enough to boil, it bursts
up through a crack in the rock,
spraying out hot water and steam.
