The University of Arizona
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Radiocarbon dates from the ice-free corridor.

Thomas G Arnold


The Ice-Free Corridor has been hypothesized as the main migration route into the Americas since the 1930s. Radiocarbon dates have been used by archaeology, geology, and palynology to date the corridor. A total of 564 (super 14) C dates ranging between 20,000 and 8000 BP from the corridor area were gleaned from the published literature. After assessing these dates for suitability, 255 were plotted over four time periods. The results indicate that the corridor was not feasible as an early human migration route until after 11,000 BP, or after the appearance of Clovis south of the continental glaciers.


ice free corridor;Laurentide ice sheet;Yukon Territory;Saskatchewan;Alberta;migration;Clovis;lower Holocene;glacial environment;British Columbia;paleoenvironment;ice sheets;Canada;Northwest Territories;Western Canada;archaeology;Holocene;glacial geology;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;isotopes;radioactive isotopes;absolute age

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