The measurements on wood of this age used in calibration are 2856±81BP (1020-1000 BC) and 2815±122BP (1000-980 BC) (Pearson et al 1986).

Belfast oak (1110-1090 BC) 2880±110BP

The measurements on wood of this age used in calibration are 2861±122BP (1120-1100 BC) and 2886±122BP (1100-1080 BC) (Pearson et al 1986).

TIRI B (3239-3200 BC) 4525±55BP

The measurement on wood of this age use in calibration is 4525±12BP (Pearson et al 1986).

TIRI D (unknown) 3905±40BP

Wheels 476 & 477: (with OxA-4877 to OxA-4886)

The measurements on wood of this age used in calibration are 2956±16BP (1220-1200 BC) and 2942±16BP (1200-1180 BC) (Pearson et al 1986).

Belfast oak (1290-1310 BC) 3005±65BP

The measurements on wood of this age used in calibration are 3042±17BP (1320-1300 BC) and 3025±17BP (1300-1280 BC) (Pearson et al 1986).

TIRI B (3239-3200 BC) 4500±50BP

The measurement on wood of this age use in calibration is 4525±123 BP (Pearson et al 1986).

TIRI D (unknown) 3880±40BP

Wheel 483: (with OxA-4900 to OxA-4905)

The measurements on wood of this age used in calibration are 2956±16BP (1220-1200 BC) and 2942±16BP (1200-1180 BC) (Pearson et al 1986).

TIRI D (unknown) 3860±65BP

Wheel 478: (with OxA-4919 and OxA-4920)

The measurement on wood of this age used in calibration is 6094±17BP (Pearson et al 1986).

Wheel 495: (with OxA-5044)

The measurement on wood of this age used in calibration is 1588±17BP (AD 480-500) (Pearson et al 1986).

The measurement on wood of this age used in calibration is 1729±17 BP (AD 280-300) (Pearson et al 1986).

UB-3787 to UB-3794

UB-3773 1262±20BP (760-780 AD)

The results produced for calibration are 1247±16 BP (Pearson et al1986) and 1255±9BP (Stuiver and Pearson 1986).

UB-3774 1205±20BP (780-800 AD)

The results produced for calibration are 1240±16BP (Pearson et al1986) and 1209±10BP (Stuiver and Pearson 1986)

UB-3775 1224±20BP (800-820 AD)

The results produced for calibration are 1224±16BP (Pearson et al 1986) and 1201±13BP (Stuiver and Pearson1986).

The wood used for these samples was taken from the exact tree used in the 1986 calibration (ie Brabstown Q3691, see McCormac et al 1994).

UB-3820 to UB-3824

UB-3801 1709±17BP (380-400 AD)

The results on material of this age produced for calibration are 1681±17BP (Pearson et al 1986) and 1671±11BP (Stuiver and Pearson 1986)

UB-3802 1475±16BP (620-640 AD)

The results on material of this age produced for calibration are 1402±18BP (Pearson et al 1986) and 1433±12BP (Stuiver and Pearson 1986)

UB-3803 1594±17BP (480--500 AD)

The results on material of this age produced for calibration are 1588±17BP (Pearson et al 1986) and 1565±13BP (Stuiver and Pearson 1986)

While the samples measured as quality controls are of the same dendrochronological dates as those measured by Gordon Pearson for the 1986 calibration data, the source of the wood is not identical. UB-3801 and UB-3802 are from trees that grew in Co Cork and Co Wexford respectively, whereas the 1986 equivalents came from the opposite end of Ireland in Co Antrim. The material for UB-3803 came from Co Antrim as did its 1986 equivalent, although they were not from the same tree.

GU-5109

C2 (Travertine) 41.22+/-22 pMC

The IAEA consensus value was 41.14pMC.

C4 (Kauri wood) 0.18+/-0.11pMC

The IAEA consensus value was 0.20-0.44pMC.

C5 (Two Creeks wood) 23.18+/-0.18pMC

The IAEA consensus value was 23.05pMC.