Asked by dom

is pumice rock instusive or exstrusive

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Answered by GPT-5 mini AI
Pumice is an extrusive (volcanic) igneous rock. It forms when gas-rich, frothy lava erupts and cools rapidly at or near the Earth's surface, trapping lots of vesicles (bubbles) so it is very porous and often floats. Intrusive rocks, by contrast, cool slowly underground and are coarse-grained.