Is there any possibility that Carolina Bays could have been formed by a tsunami depositing huge icebergs, which then melted leaving these gouges, or if covered by inwashed dirt, leaving a depression?
Just a guess, but I would say it's unlikely because any icebergs would have had to been hugging the shoreline. Otherwise, they would just ridden it out, IMO.
"...Is there any possibility that Carolina Bays could have been formed by a tsunami depositing huge icebergs, which then melted leaving these gouges, or if covered by inwashed dirt, leaving a depression?..."
I considered this possibility some years ago. The theory is enticing, but I had to reject it in light of what I discovered about how Carolina Bays are arranged on the land. See my post #119.