C14 Radiocarbon Dating - Sample - OxA-8540

Part of a cockle shell from lower deposits of a cave PROBLEM: As of 2009, the calibration is uncertain because the marine effect varies (Ascough PhD) and it is not safe simply to correct the age by 405 C14 years. CHECK NEEDED to see if d13C value really positive or '-' simply not entered by me.

Canmore ID 22924

Map Number NM82NE

Site type Cave (Period Unassigned), Human Remains (Period Unassigned), Arrowhead (Flint)

Site number 47

NGR 185460 728880

Council 130

County 03

Parish KILMORE AND KILBRIDE

Lab Analysis ID OxA-8540

Material Dated shell (cockle)

Sponsor HS

Uncalibrated date bp +/- error 7300 bp +/-50

Uncalibrated date ad/bc +/- error 5350 bc +/-50

Delta 2.6

Calibration program used No

Calibration curve used No