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Volcano Term Definitions
An igneous rock having abundant light-colored minerals.
Elongated fractures or cracks on the slopes of a volcano. Fissure eruptions typically produce liquid flows, but pyroclastics may also be ejected.
An eruption from the side of a volcano (in contrast to a summit eruption.)
Produced by the action of of flowing water.
The manner of breaking due to intense folding or faulting.