I spent 11 years doing soil investigations in Carolina Bays (in fact, on the SC side of the line in that very graphic that you show), and came to the conclusion that the phenomenon is hydrologic in nature, not cosmologic.
On the right side of that graphic, the lines from the extended long axes of the bays are projecting in the wrong direction. Looking the other way, one sees that they are all pointing “downhill”, in the direction of both surficial and subsurficial drainage: towards the coast.
This is not the place to go into the issue in detail, but I have plenty of evidence to show that Carolina Bays did NOT result from bolide impact.