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Lab number
RIDDL-1228
Material dated
marine shell (50 g); coquillage
Locality
northeast of the mouth of Cohoe Creek, south of Port Clements, Graham Island, Queen Charlotte Islands, British Columbia
Map sheet
103 F/09
Submitter
L.C. Ham
Date submitted
August 5, 0096
Date uploaded
February 14, 2020
Normalized Age
5715 ± 90
δ13C (per mil)
-0.0
Significance
Coast Microblade, Moresby; Microlame de la côte
Context
Layer B3, shell midden, 14-17 cm depth
Additional information
The age differs as expected (600-700 years older) from contemporaneous charcoal.
Comments
FjUb-10, Cohoe Creek: This shell midden represents the late Moresby Tradition and was occupied for the purpose of harvesting shellfish and other intertidal resources during the late winter between 5000 and 6000 BP. Ham reports mammal, bird and fish bones collected from the surface, not reliably associated with the dates. Subsequent work reported by Fedje and Christensen distinguishes several midden deposits, and it is not clear how these relate to Ham's column samples. Fifteen pairs of marine shell and charcoal samples contribute to a revision of the local marine carbon reservoir effect, -600 years for this area and time range.

References