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- Lab number
- Beta-9622
- Material dated
- Charcoal
- Type of date
- Geological
- Locality
- Contra Costa
- Date uploaded
- January 15, 2024
- Updater
- Wyoming team
- Date updated
- December 31, 2020
- Measured Age
- 1060 ± 60
- Context
- Unit 1N, Stratum IV, a non-cultural silt deposit that separate two well-developed midden strata