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- Lab number
- M-109
- Material dated
- Shell
- Taxa dated
- river shells
- Type of date
- Archaeological
- Locality
- Henry
- Submitter
- T.M.N. Lewis and M. Kneberg
- Date uploaded
- January 18, 2024
- Updater
- Wyoming Team
- Date updated
- December 31, 2020
- Measured Age
- 4050 ± 150
- Significance
- Ledbetter
- Context
- upper portion of shell mound overlying earlier occupation
- Additional information
- Radiometric