C14 Radiocarbon Dating - Sample - GU-2921

Shell from a sealed layer (97/817-0438) in a pit. 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

Canmore ID 2822

Map Number HY44SE

Site type Midden (Viking) - (Norse), Settlement (Viking) - (Norse)

Site number 5

NGR 345460 1043130

Council 330

County 22

Parish WESTRAY

Lab Analysis ID GU-2921

Material Dated shell (n.i.)

Sponsor HS

Uncalibrated date bp +/- error 1390 bp +/-50

Uncalibrated date ad/bc +/- error ad 560 +/-50

Delta -1.5

Calibration program used No

Calibration curve used No