Accelerator radiocarbon date confirms early deglaciation of the Queen Charlotte Islands

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Abstract
Accelerator mass spectrometry was used to test whether part of eastern Graham Island was ice free at the height of late Wisconsin glaciation on mainland British Columbia. An accelerator radiocarbon date of 14 700 ± 700 years on a small twig conforms with two conventional dates that suggested that the Cape Ball region of Graham Island was deglaciated by about 15 000 radiocarbon years ago.

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