Lobby >
Exhibits > Why
Geysers Erupt > Underlying
Geology > Clues to Look for
Clues to Look for
A
shallow body of magma extends the length of the Yellowstone Caldera
and has fueled massive volcanic eruptions in Yellowstone’s
past. You cannot see this magma chamber from the surface of the
Earth, but you can see evidence of its handiwork--if
you know what to look for.
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