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Matthew Gramling posted a new activity comment 3 years ago
3 years ago3 years agoA good app to also get is Rockd or Macrostrat depending on your phone OS. @erin-carter
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Matthew Gramling posted a new activity comment 3 years ago
3 years ago3 years agoGreetings @erin-carter ! My best guess is quartzite or similar crystalline rock.