Quote:. Simply that one would assume that this culture would continue building boats in the manner that got them across the N. Atlantic.
Sea levels rose some 400 feet when the ice retreated. If they were coastal dwellers whatever they did is under several hundred feet of water for the last 12,000 years. we are not going to find much.
I'm waiting for Rokcet Scientist to join in because he and I have gone several rounds about this over at Archaeologica.org. For most of human history sea travel has been preferred to land travel. In fact, it is not until comparatively recently that land travel has become preferred.
Overland travel is not a walk in the park. Every river crossing is a major undertaking. Even streams and gullies are dangerous. You have to constantly beware of predators and snakes. You are limited in what you can carry because you have to keep your weapons handy.
Coasting along off shore, though, is a lot easier. If the weather turns bad you head in an make camp on the shore. If the weather stays bad, you wait until it is safe to move on. All it takes is a watertight skin craft on a wood frame.
It's not as if the idea is unknown.
http://www.probertencyclopaedia.com/R_CORACLE.HTM
