books.google.co.uk - Archaeologists have long puzzled over the evidence suggesting highly sophisticated copper mining activity took place in the area of the North American Great Lakes some five thousand years ago. Menomonie Indian tradition speaks of fair-skinned mariners who had come in the past to "dig out the shiny bones"...http://books.google.co.uk/books/about/Survivors_of_Atlantis.html?id=Q_3PDWoAxE0C&utm_source=gb-gplus-shareSurvivors of Atlantis
