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- Lab number
- ISGS-646 A
- Material dated
- charcoal; charbon de bois
- Locality
- 0.5 km east of Dupo, St. Clair County, Illinois
- Map sheet
- e
- Submitter
- C.J. Bareis
- Measured Age
- 810 ± 80
- Normalized Age
- 810 ± 80
- δ13C (per mil)
- -25.0
- Significance
- Mississippian; Mississippien
- Context
- repeat run of ISGS-595, fill unit within Range phase pit, feature 106