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Caldera

A caldera is a volcanic crater which usually has a flat surface, at the bottom, formed by the hardening of a lava lake.

Yellowstone National Park is largely contained within the Yellowstone caldera[?].

Notable Calderas

Askja (Iceland)
Long Valley (California)
Valle Grande[?] (New Mexico)

Caldera Systems is a corporation initially associated with the Linux and open source movement; it changed its name in 2002 to "SCO Group". See Caldera Systems.

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