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Lab number
GSC-3850
Field number
83-MIB-HBW (2)
Material dated
whale bone collagen; collagène osseux de baleine
Taxa dated
Balaena mysticetus (107.6 g)
Locality
Hall Beach Hamlet, Melville Peninsula, Arctic Coast, Nunavut
Map sheet
47 A/15
Submitter
R. McNeely
Date submitted
July 13, 0098
Measured Age
970 ± 60
Normalized Age
1130 ± 60
δ13C (per mil)
-15.1
Significance
palaeobiology; paléobiologie
Context
frozen beach gravel, 8 m asl
Associated taxa
Mammalia: Balaena mysticetus
Comments
NeHd-VP: See Blake (1988) for a discussion of cross-check dates on different sample materials and the implications of GSC-3850 for sea-level changes. Comment (R. McNeely): This excellently preserved material was analysed to compare the results on different fractions of the same sample, and to provide information required to assess the various treatments used on bone in preparation for radiocarbon dating. Although insufficient sample material was available from the original collection to process the bone 'apatite' fraction, two separate fractions, tissue and collagen (83-MIB-HBW 1 and 2, respectively) have been processed and dated with excellent agreement between their corrected ages. L.D. Arnold, Environmental Isotopes Section, Alberta Environmental Centre, Vegreville, Alberta has also processed a portion of the original sample and dated the collagen extracted with excellent agreement (AECV-92C, 1130 +/- 90 BP). Additional material was collected in August, 1985 by L.A. Dredge. Subsamples of this material are now available to other laboratories for cross-checking purposes. Comment (A. Dyke): These dates agree well with GSC-961, 1020 +/- 130 years B.P. on marine shells from a stony silt at Hall Beach, 7 m asl (Lowdon and Blake, 1968) and together show that emergence has proceeded at an average rate of about 0.7 m per century during the last 1000 years.

References