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Lab number
GSC-3907IF
Field number
RAB-84-12
Material dated
marine shell; coquillage
Taxa dated
Hiatella arctica (id. by C.G. Rodrigues)
Locality
0.2 km north of Bearbrook, Russell County, Ontario
Map sheet
31 G/06
Submitter
S.H. Richard, C.G. Rodrigues
Date submitted
March 8, 2002
Measured Age
10200 ± 90
Normalized Age
10610 ± 90
δ13C (per mil)
0.3
Significance
palaeobiology, Champlain Sea; paléobiologie, Mer Champlain
Context
gravel pit, in sediments containing the right tibia of a small phocid seal
Associated taxa
Mammalia: Phoca sp
Additional information
This date is on the inner fraction of the shells. The normalized age is 410 years older than the corrected age given in the date list.
Comments
BiFu-VP: A seal bone was found in sediments of the Champlain Sea dated by GSC-3907 on Hiatella arctica shells (Harington, 1988: 231). Two dates were determined, one on the outer fraction and one on the inner fraction, and they are in close agreement. These dates were unconventionally reported with corrections for isotopic fractionation corresponding to 0 parts per mil (McNeely and McCuaig, 1991: 2). To make the dates compatible with others in this database, the normalized ages are expressed by adding 410 years to the uncorrected ages, thereby normalizing the dates to -25 parts per mil. A marine reservoir correction would be needed to calibrate these dates.

References