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Volcano Term Definitions
A steep slope or cliff formed directly by movement along a fault and representing the exposed surface of the fault before modification by erosion and weathering.
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.
Produced by the action of of flowing water.
The manner of breaking due to intense folding or faulting.