Crane and Griffin, 1960: 33

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
M-777 20AA5 (Mikado Earthwork Enclosure) MI 500 ± 100 -25.0
M-779 20OG-? (Linseman-Walters Earthwork) MI 600 ± 75 -25.0