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Any ideas what this purple rock may be?

0 votes

I found this rock in the Clackamas River, Oregon. This river runs from Mt. Hood. It has some quartz in it but not much. I think it is metamorphic in nature. It is a nice purple with red rock. I am sure it is volcanic in origin. It is very heavy. I haven't tried any tests on it. Any ideas?

asked Aug 31 by trishberrong (250 points)

1 Answer

0 votes
Rhyolite maybe, volcanic rock.
answered Aug 31 by Weasel (37,800 points)
Thanks, will do research on rhyolite

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