You last point: “... that the CB’s were caused when the Canadian ice sheet was hit by a very large solid chunk and huge pieces of ice sheet were sent flying to Carolina ...”
Look for this title: Carolina Bays - Evaluation of an impact hypothesis. There are several papers on this subject - that is just one I found quickly.
And from one of our own (baynut) at #61: https://cosmictusk.com/9483-2/
George A. Howard, Comet Research Group
As for the first point there are numerous sources with the corresponding documentation. One more complete sets of references to different ideas is found in Graham Hancock’s “Magicians of the Gods”. George might have more (I have not been there yet this AM), as he says in the paper (the posted article) he co-authored, it was reported incorrectly. The body that hit was part of the 100km comet, not the whole of it.
The Hancock book is primarily about what such an impact had on any existing human civilization. As you might be aware, the further back in time we trace our past, the murkier thing get, until we get to the Romans - here, while much is known, there is quite a lot about things which were central to them that we know almost nothing about - divination, oracles and so forth. Then there are the Chinese ...
Going further back, to the Old Kingdom Egyptians we have to learn to ignore logical thinking and think symbolically in order to get a glimpse of how they saw themselves and their world.
Going back even further is just near conjecture and guess work. And we are still thousands of years after the comet strike. When we get to the recently found site of Gobekli Tepe, the whole of human history known the year before had to be changed because this site dates from the time of the strike ... the oldest human civilization ever found. Which begs the question: where did they and their civilization originate?
I’m surprised I had not run into the end Younger Dryas bolide strike info before. Some years ago I was very interested to read Graham Hancock’s ideas, especially the one that so much of developing civilization is likely to be underwater because our sea levels are basically end stage levels and don’t cover much of the history of human kind. A while ago I had the idea it might be fun to start a magazine (or now a web site, it was QUITE a while ago) titled “Journal of Undersea Exploration, Archaeology, and Adventure”. To be of interest to archaeologist and anthropologists, scuba divers, undersea explorers, etc. Would be financed by memberships and by advertisers and sellers of products like diving gear, boats, travel packages, etc. Oh, well, I am too old now, but maybe someone can use this idea. Pass it on.