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- Lab number
- M-1640
- Material dated
- Wood
- Type of date
- Archaeological
- Locality
- Keweenaw (Isle Royal)
- Submitter
- J.B. Griffin
- Date uploaded
- January 17, 2024
- Updater
- Wyoming Team
- Date updated
- December 31, 2020
- Measured Age
- 440 ± 100
- Normalized Age
- 440 ± 100
- δ13C (per mil)
- -25.0
- Significance
- Late Prehistoric; Préhistorique récent
- Context
- fill in Pit 4, 2.6 ft depth, one of the latest pits of Isle Royale copper workings
- Additional information
- Radiometric