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- Lab number
- M-1275 d,e,f,g
- 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
- 4110 ± 130
- Normalized Age
- 4110 ± 130
- δ13C (per mil)
- -25.0
- Significance
- geoarchaeology; géoarchéologie
- Context
- composite, pit 56, 3.4-5.1 ft depth, bottom of mine, deposits representing natural in-filling after abandonment, therefore limiting the age of mine use