Comments on: Past climate change swings orchestrated early human migration waves out of Africa /news/2016/09/21/past-climate-change-swings-orchestrated-early-human-migration-waves-out-of-africa/ News from the University of Hawaii Sat, 16 Feb 2019 00:08:21 +0000 hourly 1 By: Jeffrey Lewin /news/2016/09/21/past-climate-change-swings-orchestrated-early-human-migration-waves-out-of-africa/#comment-597702 Sun, 25 Sep 2016 06:47:32 +0000 http://www.hawaii.edu/news/?p=50335#comment-597702 Extremely ancient sub-glacial paleoindian sites in N. America are problematic for the conventional overland migration model. The W. Coast wasn’t navigable until 14.5 kya, and the overland route was blocked by glaciers until c. 13-12 kya. Several sub-glacial American sites are too early even for a conventional post LGM migration. In the supra-glacial N. Yukon Bluefish Cave site, however, butchered fauna are found in layers 26,000 years old. Also, at this stage, sub-glacial sites like Piki Machay, Meadowcroft Rockshelter, nearly precede the fusion of ice sheets. Meanwhile, the Burnham, Oklahoma paleoindian site was occupied earlier than the fusion of the continental ice sheets, c. 22,000-21,000 years ago. Conventional models of the peopling of the Americans need to incorporate these paradigm shifting discoveries.

“Bison phylogeography constrains dispersal and viability of the Ice Free Corridor in western Canada,” Heintzman, Peter D., et. al., PNAS, 113n29, pp 8057-8063

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