“Ancient” Triangular Holes Drilled in Granite

Posted by Chris Parker
Feb 25 2006

Archeologists love to puzzle over pyramids, stone axes, and such straightforward productions of ancient man. In contrast, simple holes in boulders are hardly the things important scientific papers are written about.

Yet, scattered about the Great Plains are some 300 boulders of very hard rock, each possessing the same rounded triangular holes. Surely such a phenomenon would pique some archeologist’s curiosity!

The holes are made with high precision to the dimensions shown in the figure. They are 6 inches deep, plus or minus an inch. Holes with a rounded triangular shape represent a sophisticated drilling technology.

Steel tools of high craftsmanship are indicated.

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3 Responses

  1. s. zeilenga says:

    Cool. I might have to go looking for some myself.

    Any chance at a better photo?


  2. J. Rudebusch says:

    I have been studying and gps’ing such trishaped holes for over 8 years now. At present, we have gps’d over 200 sites world wide with this type of hole in rock. The info coming in from Iceland seems to be of importance as of this writiing.

  3. Administrator says:

    So, J.

    What do you think about the holes? What’s your theory?

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