An interesting post. Last night, completely by chance while channel surfing, I came across the Discovery Family Channel (never watched it) and stopped when I saw the beginning scroll for a show premised on people coming to North America from Europe during the last great ice age 17,000 via an ice bridge across the North Atlantic.
the show began with the discovery of a flint spearhead of a type not seen in North America until around 6,000 BC, but this one is dated at 17,000 years old and is of the same design as those in Southern France of the same era.
It was an interesting show and somewhat plausible. But they also dug up DNA linkage of Indians in north-east Canada who have about 1/4 European DNA in them, and the DNA folks said that the linkage date is over 10,000 years ago.
And the unintended point of the show was information that North America was covered with 1 mile of ice and when it melted the oceans rose 500 feet; thus planet made global warming gave us the world we have today where mankind survives and thrives.
Here are links to the show:
http://documentaryheaven.com/iceage-columbus-who-were-the-first-americans/
http://store.discovery.com/ice-age-columbus-who-were-the-first-americans-dvd/detail.php?p=84844
Very interesting. Thanks for the ping and the links.
Continental shelf archaeology would change totally what we think of the antiquity and types of Americans pre 1492, I think.