Pima Canyon Trail Native American Grinding Area
Up the Pima Canyon Trail in Tucson Arizona at the site of "The Dam" are these grinding holes in the rocks.
No one knows how many years of grinding grain at this same location it took to make the holes this deep.
At the bottom of the photo are footprints of hikers on the trail today centuries after these holes were first formed.
No Responses
Also by David Smith
Thanks for letting us know!
Thanks for voicing your concerns. Rest assured, we take it seriously. We'll look into it and take any appropriate action.
