Did you suggest an asteroid strike ?

Here's a recently Id'd heretic. Looks like the info could be interesting.

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The New Order of Man's History
by John Cogan, Winnie Alston (Editor)

It makes a convincing and fascinating argument for the author's startling theory that the world was inhabited by a fairly advanced ocean-going civilization during the last great ice age 10,500 years ago when suddenly an asteroid plunged into the Atlantic Ocean. This created much havoc -- triggering widespread volanic eruptions, rapid melting of the ice resulting in worldwide flooding, erosion of the ozone layer, destruction of much animal life, and perhaps adding a few degrees of tilt to the axis of our planet.
The "First Civilization," as author John Cogan calls it, was decimated but not destroyed when the 6 1/2-mile-wide asteroid rocked Earth. Cogan weaves into his theory plausible answers to several of unsolved mysteries including the legend of Atlantis, the ability of the Egyptians to build the pyramids, and the source of the Mayan calendar, to name a few.
A lawyer living in the Seattle area, Cogan is a self-taught anthropologist who spent thirty years researching for "The New Order of Man's History." It shows. The author had to become conversant in an assortment of scientific disciplines to pull this off.

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• Book on asteroid hit 10,500 years ago