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What is this rock? [solid red rock with black porous substance on top]

0 votes

asked Jul 28, 2019 by RockNewbee33 (120 points)

1 Answer

0 votes
Best guess is rhyolite on the pink. On the porous Black rock I'm thinking that is pumice
answered Aug 1, 2019 by Weasel (58,850 points)
edited Aug 6, 2019 by Weasel