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Liberty Cap This 37-foot (11-m) hot spring cone marks the northern portion
of Mammoth Hot Springs. Liberty Cap was named in 1871 by the Hayden Survey party because
of its marked resemblance to the peaked caps worn during the French Revolution. Its
unusual formation was created by a hot spring whose plumbing remained open and in one
location for a long time. Its internal pressure was sufficient to raise the water to a
great height, allowing mineral deposits to build continuously for perhaps hundreds of
years. Mammoth Hot Spring Tour |