Crane and Griffin, 1972: 166

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
M-2398 20CX18 (O'Neil) MI 430 ± 100 -25.0
M-2401 20CX18 (O'Neil) MI 1000 ± 140 -25.0
M-2405 20CX18 (O'Neil) MI 670 ± 100 -25.0
M-2406 20CX18 (O'Neil) MI 740 ± 100 -25.0
N-1268 20CX18 (O'Neil) MI 905 ± 115 -25.0