Humans Hunted Mastodon in Florida Nearly 15,000 Years Ago
gizmodo.com
gizmodo.com
http://pubs.usgs.gov/circ/c1075/images/sea.gif
Interestingly, there is little change near the southern tip of Florida, which might explain the locations of the findings in TFA.
As you can seeon the map, huge areas were dry land then but are ocean today. On a global scale, these include the entire Hudson Bay, and all the sea between the UK and Western/Northern Europe.
So I guess your theory isn't controversial at all.
http://www.amazon.com/Magicians-Gods-Forgotten-Wisdom-Civili...
They seem to be quite well written, too!
Aside from outlier examples to the contrary, there was basically nothing around for the European settlers to discover but basic tribesmen, oral history and primitive notions of things like weather, cosmology, medicine, etc.
15,000 years. Stone Age.