volcanic rock

Alternative definitions (0), class: vernacular (0)
Term: volcanic rock
Definition:

Volcanic rock is an igneous rock produced by extrusion from a volcano. It has various subtypes based on chemical composition and whether the extrusion was violent (pyroclastic) or slow (laval). [Wikipedia]

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
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