Liu and Coleman (1981) Illinois State Geological Survey Radiocarbon Dates VII, Radiocarbon 23(3), p. 352-383 per Dalton et al. 2020-An Updated Radiocarbon-Based Ice Margin….

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
ISGS-271 12990 ± 120
ISGS-426 13300 ± 240