The canyons were formed when stabilizing trees were cleared from hillsides to create more farmland according to the Georgia parks department.
Still not finished forming....every 12 inch rain event adds to the erosion. They are truly beautiful in spite of the ecological implications of clearing hillsides in an area that gets deluges of rain on a regular basis.
The canyon was formed in the past 60 or 70 years - not thousands of years ago, also according to GA parks department.
It is possible to hike on a good trail to the bottom of the canyon and walk along the base of all the sculpted hillsides.