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United States / SD / Brookings County / 39BK100 (Chalk Rock)
Samples
| Lab number | Site | Province / State | Normalized age | δ13C (per mil) |
|---|---|---|---|---|
| Beta-184340 | 39BK100 (Chalk Rock) | SD | 10900 ± 40 | -23.4 |
| Beta-195742 | 39BK100 (Chalk Rock) | SD | 9010 ± 40 | |
| Beta-195743 | 39BK100 (Chalk Rock) | SD | 10860 ± 40 | -26.2 |