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Lab number
SFU-571
Material dated
charcoal; charbon de bois
Locality
north of Point Roberts, ca. 2 m asl, Strait of Georgia, British Columbia
Map sheet
92 G/03
Date submitted
March 8, 0099
Date uploaded
February 14, 2020
Measured Age
4120 ± 120
Normalized Age
2280 ± 60
Significance
culture?
Stratigraphic component
Zone E
Context
Zone E, in road cut, 150 cm depth
Comments
DgRs-2, Tsawwassen: The excavaters distinguish seven zones (A-G), each with its own stratigraphic and cultural sequence. R. Brolly (p.c. 1999) examined the reports from the Beta laboratory and confirmed that the dates on human bones are uncorrected ages. These must be normalized by adding at least 100 years to the mean, but they cannot be precisely corrected for isotopic fractionation in the absence of measured C-13 ratios.

References