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- Lab number
- M-1275 c
- Material dated
- charcoal; charbon de bois
- Locality
- ca. 69 m above Lake Superior on Greenstone Ridge near Monument Rock, Isle Royale, Keweenaw County, Michigan
- Map sheet
- e
- Submitter
- T. Bastian
- Date updated
- June 28, 1999
- Measured Age
- 2800 ± 120
- Normalized Age
- 2800 ± 120
- δ13C (per mil)
- -25.0
- Significance
- geoarchaeology; géoarchéologie
- Context
- pit 56, 3.2-3.4 ft below the highest edge of the mine, deposits representing natural in-filling after abandonment, therefore limiting the age of mine use