For a guy who has been known to climb out on a limb or two yourself, Charlie, let me join you.
I think what it means is that the basic story is true. In a court of law if you get five witnesses saying the same thing it is going to have quite an effect on a jury...this is 600 witnesses.
What do they say? Leaving out the religious mumbo-jumbo we get:
a- Mankind was numerous,
b- There was a flood or some other inundation,
c- Mankind was significantly reduced in numbers,
d- There was some kind of warning given but too late to save more than a handful.
e- Afterwards, contact between far-flung groups was lost and society re-emerged in isolation.
Hancock suggests the end of the last ice age and the melt down. It's a theory worthy of study but I'm not sure if it would have been catastrophic enough. Perhaps a meteor or comet strike in the ocean with tsunamis? I've seen models which suggest that a hit in the Southern Pacific would generate world wide tsunamis,
A significant alluvial event occurred here in central Texas, according Collin's, et al., around 12,000-13,000 B.P. (14,000-15,200 B.P. Calibrated), about a millenium prior to Clovis. The event was significant enough to move downstream, and incorporate, with roughly equal distribution, within the smaller gravel and boulder matrix, very heavy boulders, in the 200-300 pound range. The flooding I see these days seems very strong, but I've yet to see any of these current floods even budge the larger boulders. I really can't imagine the ferocity of the flooding that mixed these huge boulders within the gravel matrix, up to 8-10 feet above the limestone creekbed, on which the gravel/ boulder stratum caps...
Here's a hypothesis Steen-McIntyre has been tinkering with:
Firestone, R., A. West, and
S. Warwick-Smith, 2006, THE CYCLE OF COSMIC CATASTROPHES: FLOOD, FIRE, AND FAMINE IN THE HISTORY OF CIVILIZATION, Bear Company, Rochester,Vermont, 392 pp, ISBN 10:1-59143-061-5.
...But I didn't know about the supernova's effects then, which
included rapid meltdown of northern ice sheets and massive
northern-hemisphere flooding 16,000 years ago ( p. 18 ). Evidence for
that event might be the gravel cap....