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- Lab number
- GSC-2899
- Field number
- BS-70-163
- Material dated
- walrus bone collagen; collagène osseux de morse
- Taxa dated
- Odobenus rosmarus tusk (328.2 g, id. by C.R. Harington)
- Locality
- on the west side of the isthmus connecting Marina Peninsula with the main part of Coburg Island, Nunavut
- Map sheet
- 38 G/13
- Submitter
- W. Blake, Jr.
- Date submitted
- July 17, 0098
- Measured Age
- 8570 ± 100
- Normalized Age
- 8690 ± 100
- δ13C (per mil)
- -17.4
- Significance
- palaeobiology; paléobiologie
- Context
- upper part of a 15 m-high sea cliff exposure, 5.1 m asl
- Associated taxa
- Mammalia: Odobenus rosmarus
- Comments
- QlFv-VP, Coburg Island: The age of the walrus tusk, one of only a few dated in the Canadian Arctic Archipelago (Blake, 1983; Harington, 1975) agrees closely with the ages of marine pelecypods and marine algae nearby (e.g., Hiatella arctica shells, GSC-2361, 8730 +/- 90 years). All occur above a non-fossiliferous sand-gravel-cobble unit, which in turn overlies a sand layer containing Mytilus edulis (GSC-1425, >38 000). The tusk was 43 cm long, but only an 8 cm-long section (5.5-13.5 cm from the base) was used for dating; cross-sectional measurements were 6.2 to 6.7 cm by 4.0 to 4.3 cm.