marissasully
off to a rocking start
Member since August 2021
Posts: 15
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Post by marissasully on Aug 15, 2021 11:10:24 GMT -5
I found these in Lake Michigan and have no clue what they could be. Help!
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Post by mohs on Aug 15, 2021 11:56:35 GMT -5
Only have vague idea of what the two little heart shaped stones in hand may be. Certainly a long geologically wear process occurred that wore those down & welded the little bits of minerals together Other will have a much better idea of the composition m hs
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Post by fernwood on Aug 15, 2021 12:00:10 GMT -5
Amygdaloidal basalt for the dark one with crystals.
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Post by rmf on Aug 17, 2021 20:28:58 GMT -5
Rhyolite Porphyry In the yooper land there is both Rhyolites and Basalts. Rhyolites are fine grain Granite in composition. Basalts typically have an olivine component so blackish green.
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