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Lab number
RL-288
Material dated
seal bone collagen; collagène osseux de phoque
Taxa dated
Phoca hispida
Locality
on an island in the upper part of Cumberland Sound, 11.5 m asl, 8 km west of recently abandoned Immigen, Baffin Island, Nunavut
Map sheet
26 G/14
Submitter
P. Schledermann
Date submitted
September 1, 0097
Measured Age
780 ± 90
Normalized Age
940 ± 90
δ13C (per mil)
-15.0
Significance
Neoeskimo, Modified Thule; Néoesquimau, Thuléen
Context
Test 7-M, lowest occupation level, 30-35 cm depth
Associated taxa
Mammalia: Phoca hispida, Phoca groenlandica, Erignathus barbatus, Delphinapterus leucas, Balaena mysticetus, Rangifer tarandus, Canis familiaris
Additional information
It is assumed that this date was not corrected previously for isotopic fractionation.
Comments
LlDj-1, B-1: This is a Thule site with 15 winter houses. Schledermann (1975: 85) was aware of the need to make a correction for the marine reservoir effect. He cited a study by McGhee and Tuck (1976), then in manuscript, which had explored a constant correction of -400 years but had concluded by ignoring all sea mammal dates. Schledermann considered both approaches to be extreme. By considering his radiocarbon dates in relation to stylistic traits on recovered harpoon heads, he elected to subtract 200 years from the uncorrected means of the dates. Had he first corrected his dates for isotopic fractionation, the -400 year correction would have yielded very similar results, within measurement error.

References