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geology question: is there a term for these sort of incision marks on river cobbles?
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Anonymous Coward |
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Traveling Route 93 in Arizona, I stopped to climb on some very large boulders that had the same formation. They looked like they had been superheated, became semi-liquid forming bulges with smooth round curves, but developing cracks and striations when cooling.
Massive piles of such rocks in the middle of nowhere, as if they were asteroid debris that had fallen to earth thousands of years ago.
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Quoting: Zovalex very interesting. arizona is a bit removed from eastern canada as far as the glacial epochs go, from what i understand. perhaps any link(s) between the two do indeed go further back or beyond any relatively recent surfacd events? hmm
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