Looks like impacts on the rock.

    • Thcgrasscity@lemmy.caOP
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      1 year ago

      I believe it is, i was hiking just outside of the Sudbury basin where a massive meteor hit. There were dozens of these impacts. They look completely different then any of the sample coring they did.

  • jerkface@lemmy.ca
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    1 year ago

    Could it have been lightning? Does the rock absorb water that could have flashed to steam?