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

0 votes

asked Jul 28 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 by Weasel (58,240 points)
edited Aug 6 by Weasel