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Canada / BC / DgRs-2 (Tsawwassen) / SFU-570
- Lab number
- SFU-570
- 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
- February 13, 0097
- Date uploaded
- February 14, 2020
- Measured Age
- 860 ± 60
- Normalized Age
- 210 ± 55
- Significance
- Stselax
- Stratigraphic component
- Zone A
- Context
- Zone A, hearth, feature A27, unit A59, Layers AB1/AB contact, 40 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.