New Radiocarbon Dates from the Yale Area of the Lower Fraser River Canyon, British Columbia

@article{Mathewes1972NewRD,
  title={New Radiocarbon Dates from the Yale Area of the Lower Fraser River Canyon, British Columbia},
  author={R. Mathewes and C. Borden and G. Rouse},
  journal={Canadian Journal of Earth Sciences},
  year={1972},
  volume={9},
  pages={1055-1057}
}
Three new radiocarbon dates from two lakes near Yale, B.C. establish that ice-free conditions existed in parts of the Lower Fraser Canyon as early as 11 430 ± 150 B.P. A volcanic ash layer found in both lakes is considered to have come from the Mount Mazama eruption, based on a radiocarbon date from Squeah Lake. Mention is made of the problematic relationship of the three new dates to post-Vashon chronology in this area. 
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Late Quaternary geology and geomorphology of the Chilliwack River Valley, British Columbia
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