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United States / MI / Keweenaw County / 20IR30 (Lookout) / M-1276 b

Lab number
M-1276 b
Material dated
wood; bois
Taxa dated
Betula sp.
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 30, 1999
Measured Age
410 ± 100
Normalized Age
410 ± 100
δ13C (per mil)
-25.0
Significance
Late Prehistoric; Préhistorique récent
Context
log from aboriginal copper mine, 5.1 ft below top of fill, 1.1 ft from bottom of pit 4, 8.3 ft deep

References