Table S-1. Radiocarbon dates for cores GGC-19 and P1/B3								
								
					Calibrated Age (yr)			
Core	Depth (cm)	Composite Depth (cm)*	Material Dated	14C Age (yr)	ÆR=400	ÆR=506	2-sigma range	Source
92AR-B3	0-1	0.5	mixed benthic foraminifers	940 ± 70	170		66-266	Darby et al. (2001)
92AR-B3	12-13	12.5	mollusc fragments	1230 ± 30	450		384-525	Darby et al. (2001)
92AR-B3	25-26	25.5	mollusc fragments	1530 ± 30	690		629-746	Darby et al. (2001)
92AR-B3	41-42	41.5	mollusc fragments	1980 ± 30	1140		1063-1218	Darby et al. (2001)
92AR-P1	24-26	45	mollusc fragments	2170 ± 90	1330		1216-1444	Darby et al. (2001)
92AR-P1	49-51	70	mollusc fragments	3340 ± 50	2710		2464-2890	Darby et al. (2001)
92AR-P1	64-66	85	mixed benthic foraminifers	5120 ± 110	4990		4639-5304	Darby et al. (2001)
92AR-P1	99-100	119.5	mixed benthic foraminifers	6240 ± 70	6260		6171-6367	Darby et al. (2001)
92AR-P1	105	125	Bathyarca sp.	6590 ± 70	6630		6510-6736	Darby et al. (2001)
92AR-P1	134-136	155	mixed benthic foraminifers	7030 ± 110	7140		6996-7279	Darby et al. (2001)
GGC-19	56		mixed benthic foraminifers	2040 ± 35		1090	975-1182	Keigwin et al. (2006)
GGC-19	166		mollusc fragments	3650 ± 40		2930	2804-3061	this study
GGC-19	220.5		mixed benthic foraminifers	4270 ± 40		3700	3582-3822	Keigwin et al. (2006)
GGC-19	326		Portlandia arctica	5040 ± 35		4740	4616-4829	this study
GGC-19	336		mollusc fragments	5320 ± 35		5110	4970-5250	this study
GGC-19	339		Nonion labradoricum	5290 ± 50		5060	4883-5243	Keigwin et al. (2006)
GGC-19	361		Portlandia arctica	5570 ± 50		5420	5303-5550	this study
GGC-19	400		mixed benthic foraminifers	5840 ± 80		5700	5561-5890	Keigwin et al. (2006)
GGC-19	411		Neptunea sp. (gastropod)	6260 ± 40		6180	6050-6275	this study
								
* for P1/B3 cores