Core Drill Marks and Striations: Something Was Spinning Against This Stone @cosmicsummit

Uploaded August 2026 | Updated September 2026, 2 weeks ago

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Derek Olsen's position on the famous marshmallow-like fit of Sacsayhuamán's stones is that geopolymer casting was likely one technique among several the ancients employed, but it cannot account for everything he sees on site, particularly the precision right-angle cuts and visible core drill marks and striations that point to something spinning against the stone.

Core Drill Marks and Striations: Something Was Spinning Against This Stone

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