A caldera is
A. not associated with andesitic or rhyolitic volcanism, but only with basaltic volcanism.
B. an alternate name for boiling mud pots in thermally active areas.
C. a topographically low area that results from the collapse of a volcano after its magma chamber empties or removal of the top of a volcano during an explosive eruption.
D. only preserved for short periods of time, so that ancient calderas do not exist.
Answer: C
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