This would make it the oldest documented site of human occupation in the upper Midwest. There were also artifacts such as antler-scrapers dating back to six to seven thousand years ago. Evidence indicates that the shelter was used only periodically at first, perhaps as a hunting or seasonal camp.
This would make it the oldest known site of human habitation in the upper Midwest. There were also tools made from antlers dating back to around six to seven thousand years ago. The shelter was initially used sporadically, possibly as a hunting or seasonal encampment.