C14 Radiocarbon Dating - Sample - GU-2919

Shell from a sealed layer (97/806) 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 2919

Map Number HY45SW

Site type Building (Medieval) - (Post Medieval), Kelp Pit (18th Century) - (20th Century), Naust (Viking), Settlement (Viking) - (Medieval), Coin(S) (16th Century) - (17th Century)

Site number 4

NGR 344350 1050670

Council 330

County 22

Parish WESTRAY

Lab Analysis ID GU-2919

Material Dated shell (n.i.)

Sponsor HS

Uncalibrated date bp +/- error 1370 bp +/-50

Uncalibrated date ad/bc +/- error ad 580 +/-50

Delta -1.6

Calibration program used No

Calibration curve used No