[blam]

"And also probably also formed Lake Michigan, and the Carolina Bays formed by great chunks of ice thrown south and east."

Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)

[gleeaikin]

Thank you, I found the book at your link. It is a detailed analysis of what really caused the sudden cool down around 13,000 years ago, and triggered the extinction of the Northern Hemisphere megafauna on two continents.

The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization
by Richard Firestone, Allen West, Simon Warwick-Smith

Unfortunately the book cover itself did not carry here with my copy method.