The protracted Holocene extinction of California's flightless sea duck ( Chendytes lawi ) and its implications for the Pleistocene overkill hypothesis

Jones et al. 10.1073/pnas.0711140105.

Supporting Information

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Fig. 2. Percentage frequencies of the bones of Chendytes lawi and the sea otter (Enhydra lutris) through the Holocene from the Diablo Canyon site (CA-SLO-2). The figure was prepared by Brian F. Codding (Department of Anthropology, Stanford University, Stanford, CA). NISP, number of identified specimens (nonintrusive and economically significant species only).

Table 2. Summary of all finds of Chendytes lawi from California archaeological sites depicted in Fig. 1 and calibrated, nonassociated radiocarbon dates

Site (CA-)	Laboratory no.	Chendytes, n	Depth, cm	Material	Taxon	Conventional ¹⁴C age, years B.P.	2 Sigma range	Ref.
ORA-64	UCLA-1777A	*	20-30	Shell	-	5990 ± 80	4390-4000 BC	1
ORA-64	UCR-513		60-80	Shell	Chione sp.	6135 ± 190	4790-3950 BC
ORA-64	UCLA-1777C		70-80	Shell	-	5310 ± 80	3650-3320 BC
		TOTAL= 9
SBA-97	Beta-34199		41	Shell	Tivela stultorum	7100 ± 80	5600-5290 BC
SBA-97		1	40-60
SBA-97		2	60-80
SBA-97	Beta-39042		70	Shell	Tresus nuttallii	7480 ± 100	5980-5590 BC	2
SBA-97	Beta-34200		70	Shell	Tresus nuttallii	7920 ± 100	6420-5980 BC
SBA-97	Beta-18534		100-120	Shell	Polinices lewisi	6340 ± 100	4830-4350 BC
		TOTAL= 3

SBA-210	UCR-254		180-200	Shell	Haliotis sp.	2650 ± 150	470 BC -AD 250	3
SBA-210	UCR-299		340-360	Shell	Mytilus californianus	3940 ± 200	2210-1210 BC
SBA-210	UCR-255		340-360	Shell	Mytilus californianus	9460 ± 370	9160-7000 BC
SBA-210		3	500-520
SBA-210	UCR-298		520-540	Shell	Mytilus californianus	4730 ± 200	3320-2190 BC
SBA-210	UCR-256		520-540	Shell	Mytilus californianus	5060 ± 230	3700-2560 BC
		TOTAL= 3

SBA-552	Beta-19937	*	140-160	Shell	Mixed	7550 ± 90	6010-5620 BC	3
SBA-552	UCR-260		149-160	Charcoal	-	3630 ± 200	2570-1520 BC
SBA-552	UCR-261		160-180	Shell	Mytilus californianus	7320 ± 280	6170-5070 BC
SBA-552	Beta-19936		180-200	Shell	Mytilus californianus	7110 ± 120	5650-5220 BC
SBA-552	UCR-262		260-280	Charcoal	-	7580 ± 300	7280-5810 BC
SBA-552	UCR-263		500-520	Shell	Mytilus californianus	8400 ± 350	7650-5980 BC
		TOTAL= 18
SBA-2067	Beta-20410		260	Shell	Septifer bifurcatus	4230 ± 100	2360-1760 BC	4
SBA-2067		3	160-280
SBA-2067	Beta-18608		Below F. 1	Charcoal	-	4300 ± 80	3260-2680 BC
		TOTAL= 3
SCR-7	Beta-204032	*	-	-	-	-	1600-1370 BC
SCR-7	Beta-35204		Basal mound levels	Bone	Sea lion	5970 ± 120	4370-3880 BC	5, 6
SCR-7	WSU-3598		Lower midden	Shell	Mytilus californianus	4930 ± 110	3280-2590 BC
SCR-7	WSU-3569		Lower midden	Shell	Mytilus californianus	4980 ± 140	3360-2580 BC
SCR-7	I-7827		Lower midden	Shell	-	5800 ± 100	4210-3690 BC
SCR-7	WSU-3597		Upper midden, lower area	Shell	Mytilus californianus	4910 ± 80	3090-2650 BC
SCR-7	I-7828		Upper midden	Shell	-	4200 ± 110	2260-1630 BC
		TOTAL= 46

SCR-60		5	60-80
SCR-60		2	80-100
SCR-60		1	100-120
SCR-60		1	120-140
SCR-60		2*
SCR-60	LLNL-75996		*	Bone	Homo sapiens	4210 ± 60	2480-2140 BC	7
SCR-60	LLNL-75997		*	Bone	Homo sapiens	7060 ± 100	5640-5300 BC
SCR-60	LLNL-85654		*	Bone	Zalophus californianus	5475 ± 50	3700-3490 BC
SCR-60	LLNL-75995		*	Bone	Homo sapiens	4370 ± 50	2670-2420 BC
SCR-60	LLNL-75994		*	Bone	Homo sapiens	6570 ± 50	5080-4790 BC
SCR-60	LLNL-75998		*	Bone	Homo sapiens	6740 ± 60	5310-4990 BC
SCR-60	LLNL-75999		*	Bone	Homo sapiens	6470 ± 50	4960-4700 BC
SCR-60	LLNL-76000		*	Bone	Homo sapiens	6490 ± 50	4990-4720 BC
SCR-60	LLNL-98351		*	Bone	Homo sapiens	6535 ± 45	5040-4780 BC
SCR-60	LLNL-98352		*	Bone	Homo sapiens	6540 ± 70	5080-4720 BC
SCR-60	LLNL-85666		*	Bone	Cervus elaphus