Table 1

Summary of Iyatayet radiocarbon dates from all three components, with modeled start and end dates. All dates were calibrated at 1 sigma using OxCal 4.2 (Bronk Ramsey and Lee 2013). Marine dates calibrated using a ∆R of 477±60. *Suspect dates.

Lab Number	¹⁴C Date	σ	Mean Cal BP	2σ	Cal Age Range (2 σ)	δ13	Material	Excavation Unit	Notes	Reference
NUKLEET
M 1260a	960	100	530	120	AD 1210–1670	NA	Residue	NR	50% marine	Crane and Griffin 1964
M 1260b	1050	110	610	120	AD 1050–1620	NA	Residue	NR	50% marine	Crane and Griffin 1964
Beta-157235	510	40	540	40	AD 1310–1450	−20.6	Caribou antler	H1	AMS	Murray et al. 2003
Beta-157234	630	40	610	40	AD 1280–1410	−20.6	Caribou antler	F	AMS	Murray et al. 2003
Beta-157233	1440	40	560	50	AD 1280–1500	−14.8	Walrus Ivory	E	AMS; 100% marine	Murray et al. 2003
AA101353	749	41	690	30	AD 1200–1390	−18.1	Caribou collagen	Trench A-W	AMS	Tremayne 2015b
Beta-328287	1140	30	500	90	AD 1290–1640	−15.1	Canid collagen	Slope	AMS; 75% marine	Tremayne 2015b
Modeled Start			680	70	AD 1150–1390
Modeled End			500	60	AD 1320–1570
NORTON
C-506	1460	200	1390	210	AD 130–980	NA	Charcoal	Cut PA		Giddings 1964:244
C-562	2016	215	2010	260	750 BC–AD 530	NA	Charcoal	House 7		Giddings 1964:245
P-13a	2420	270	2490	330	1220 BC–AD 120	NA	Charcoal	House 7	base timbers	Giddings 1964:245
P-13b	2530	330	2630	400	1500 BC–AD 90	NA	Charcoal	House 7	base timbers	Giddings 1964:245
P-13c	2130	260	2150	320	810 BC–AD 400	NA	Charcoal	House 7	base timbers	Giddings 1964:245
P-13 AVG	2360	170	2420	210	840–40 BC	NA	Charcoal	House 7	Avg. 3 dates	Giddings 1964:245
P-13d	2213	110	2220	150	270 BC–AD 150	NA	Charcoal	House 7	CO₂ det.	Giddings 1964:245
M-1260c	2720	130	2370	200	800–40 BC	NA	Residue	NR	50% marine	Crane and Griffin 1964
AA102993	1962	39	1910	40	50 BC–AD 130	–25.4	Charcoal	STP-5	AMS	Tremayne 2015b
AA102989	2274	39	2260	60	410–200 BC	–26.2	Charcoal	Trench A-E	AMS	Tremayne 2015b
AA102987	2160	39	2180	80	370–90 BC	–24.6	Charcoal	Trench A-W	AMS	Tremayne 2015b
Beta-328284	2250	30	2250	60	400–200 BC	−23.8	Charcoal	STP-1A	AMS	Tremayne 2015b
Beta-328285	2070	30	2040	50	180–1 BC	−22.9	Charcoal	STP-1A	AMS	Tremayne 2015b
Beta-328286	2260	30	2260	60	400–200 BC	−23.4	Charcoal	STP-1A	AMS	Tremayne 2015b
AA101352	2322	35	2330	50	490–230 BC	−25.3	Charcoal	STP-1A	AMS	Tremayne 2015b
AA101351	2901	48	2070	100	340 BC–AD 70	−14.6	Walrus collagen	Trench A-W	AMS; 100% marine	Tremayne 2015b
Beta-422596	2330	30	2350	30	490–260 BC	−23.9	Charcoal	PB	AMS	Tremayne 2015b
Beta-422597	2260	30	2260	60	400–200 BC	−28.2	Birch Bark	Z4	AMS	Tremayne 2015b
Modeled Start			2390	50	560–370 BC
Modeled End			1890	80	100 BC–AD 220
DENBIGH
P-102a	3290	290	3560	380	2440–890 BC	NA	Charcoal	Cut R		Giddings 1964:246
P-102b	3320	200	3580	260	2200–1110 BC	NA	Charcoal	Cut R		Giddings 1964:246
P-102AVG	3310	200	3570	260	2150–1080 BC	NA	Charcoal	Cut R	Avg. 2 dates	Giddings 1964:246
P-104a	3240	280	3500	360	2280–830 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-104b	2730	300	2870	370	1650–180 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-104c	3030	280	3230	340	2020–540 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-104AVG	3000	170	3170	200	1620–830 BC	NA	Soil and Peat	Cut Z-5B	Avg. 3 dates	Giddings 1964:245
P-108a	2880	280	3050	340	1760–390 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-108b	3280	300	3550	390	2410–840 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-108AVG	3080	210	3270	260	1880–820 BC	NA	Soil and Peat	Cut Z-5B	Avg. 3 dates	Giddings 1964:245
P-105	4040	280	4540	390	3370–1780 BC	NA	Soil and Peat	Cut Z-5B	Geoarch	Giddings 1964:245
P-103a	3430	280	3750	370	2570–1050 BC	NA	Charcoal and Mud	Cut Z-5D		Giddings 1964:245
P-103b	3520	290	3870	380	2850–1130 BC	NA	Charcoal and Mud	Cut Z-5D		Giddings 1964:245
P-103AVG	3480	200	3790	260	2460–1320 BC	NA	Charcoal and Mud	Cut Z-5D	Avg. 2 dates	Giddings 1964:245
C-792a	3477	310	3820	410	2840–1040 BC	NA	Charcoal and Mud	Cut Z-5B		Giddings 1964:245
C-792b	3541	315	3900	420	2870–1130 BC	NA	Charcoal and Mud	Cut Z-5B		Giddings 1964:245
C-792AVG	3509	230	3840	300	2490–1290 BC	NA	Charcoal	Cut Z-5B	Avg. 2 dates	Giddings 1964:245
W-298	3974	600	4510	760	4050–1040 BC	NA	Charcoal	Cut Z-5A	Date suspect	Giddings 1964:246
C-793a*	4253	290	4830	390	3640–2130 BC	NA	Charcoal	Cut R	Date suspect	Giddings 1964:245
C-793b*	5063	315	5820	370	4590–3030 BC	NA	Charcoal	Cut R	Date suspect	Giddings 1964:245
*C-793 AVG**	4655	214	5320	270	3650–2880 BC	NA	Charcoal	Cut R	Avg. 2 dates	Giddings 1964:245
Beta-319843	3300	30	3525	40	1650–1500 BC	−27.3	Birch Bark	NR	AMS	Tremayne and Rasic 2016
AA102988	3431	32	3690	55	1880–1640 BC	−24.5	Charcoal	Unit R1	AMS	Tremayne 2015b
Beta-422595	3460	30	3740	60	1890–1690 BC	−25.6	Charcoal	Unit R1	AMS	Tremayne 2015b
AA102992	3494	41	3765	55	1930–1690 BC	−24.9	Charcoal	Unit Z4	AMS	Tremayne 2015b
15C/0640	3440	40	3710	60	1890–1650 BC	NA	Charcoal	Unit Z4	AMS	Tremayne 2015b
AA102990	3717	39	4060	60	2280–1980 BC	−24.4	Charcoal	Unit PB	AMS	Tremayne 2015b
15C/0639	3500	40	3770	60	1940–1690 BC	NA	Charcoal	Unit PB	AMS	Tremayne 2015b
Modeled Start			4750	430	3570–2050 BC					All dates
Modeled End			3390	160	1670–1110 BC					All dates
Modeled Start			4070	170	2310–1940 BC					Suspect dates rejected
Modeled End			3480	90	1690–1340 BC					Suspect dates rejected