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- Lab number
- S-790
- Field number
- CMC- 615
- Material dated
- charcoal; charbon de bois
- Locality
- left bank of the south arm of the Fraser River, 8 m asl, 4 km downstream from river bifurcation, British Columbia
- Map sheet
- 92 G/02
- Date submitted
- July 11, 0096
- Date uploaded
- February 14, 2020
- Measured Age
- 4190 ± 110
- Normalized Age
- 2340 ± 120
- δ13C (per mil)
- -25.0
- Significance
- Marpole
- Stratigraphic component
- Component 1
- Context
- Component I, XU 6, 0.93 m depth
- Comments
- DgRr-6, Glenrose Cannery: This is a stratified shell midden with three main discernible stratigraphic units. Unit I (S-787, S-790) is possibly intermediate between Marpole and Locarno Beach phases. Unit II (S-788, S-789), with strong ties with the lowest levels of the St. Mungo site (DgRr-2), 0.8 km downriver, appears to antedate Locarno Beach. Unit III contained artifactual material not previously observed in the Fraser Delta, thought to antedate the Mayne Island phase of ca. 4000 years BP. Matson (1976) mentions only one of the four dates submitted by Loy (S-788), and he reports 10 dates from the Gakushuin laboratory. Five of the latter pertain to the Old Cordilleran component. Of these, GaK-4864 from XU 7, is anomalous, being at least 2000 years too recent. Of the other four, GaK-4649 is younger than expected from its stratigraphic position but is within the established age range of Old Cordilleran. The remaining three dates (GaK-4650, -4865, -4866) are in correct order with regard to stratigraphy. The St. Mungo component has three Gakushuin dates. GaK-4648 is from the base of the component and is the oldest. GaK-4867 is somewhat younger than expected but within the known age range of the component, and GaK-4683 is from the uppermost portion of the component. The Marpole component is dated by GaK-4646 and GaK-4647. In 1989, waterlogged deposits were discovered within the beach adjacent to the upland part of the site, and these produced a series of dates from the Beta and RIDDL laboratories.