Well the above is another mystery
one at time please!
There is a picture in the book
“Hiker Guide…. Superstition Wilderness” (page 157)
that shows similar type holes in the Garden Valley region.
Not sure if these would be the ones Tom is referring too?
The author seem to indicate they are man-made.
Another mystery I find fascinating are holes that
were made to support wood stumps.
Perhaps, for a WoodHenge?
They have been found in the Cahokia area
of the Midwest Indian mounds.