The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Simon Warwick-Smith
This tracing the Atlantic coast tectites to the Laurentian Shield is an exciting new find, but the Firestone book tells a pretty clear story. Also, he shows an underwater map of Lake Michigan and says it shows 2 craters. However, looking at it carefully I feel I identify 3. Kind of like this: OoO. Looks a little like an ant body. Check it out, tell me if you see it too.