The Carolina Bays in NC / SC are quite a mystery. I can't help but think of remnants of an impact - on the glacial ice sheet - to the North West... similar to the location of the comet impact ~12.5K years ago. Has Graham every looked into these?
[en.wikipedia.org]
Pouring through his books now!
-ArcherDog
[en.wikipedia.org]
Pouring through his books now!
-ArcherDog