"Table S2.     40Ar/39Ar step-heating results for the groundmass concentrate, biotite and hornblende samples."											
ID	Temp	40Ar/39Ar	37Ar/39Ar	36Ar/39Ar	39ArK 	K/Ca	Cl/K	40Ar*	39Ar	Age	±2s
	(°C)			(x 10-3)  	(x 10-15 mol)		(x 10-3)  	(%)	(%)	(Ma)	(Ma)
"19-133-1, groundmass, 48.78 mg,  J=0.0006998±0.11%, D=1.0069±0.001, NM-137,  Lab#=52210-01"											
A	625	2719.94	1.90	8985.98	0.88	0.27	11.76	2.38	2.95	80.07	54.23
B	700	1115.08	1.65	3601.32	2.15	0.31	5.63	4.58	10.20	63.39	13.71
C	750	207.85	1.51	611.45	1.50	0.34	2.08	13.13	15.24	34.18	4.76
D	800	135.75	1.41	368.24	2.19	0.36	1.45	19.93	22.63	33.87	2.54
E	875	88.11	1.30	206.59	3.32	0.39	0.73	30.84	33.79	34.02	0.85
F	975	54.42	0.98	94.41	3.52	0.52	0.77	48.88	45.65	33.30	0.43
G	1075	38.54	0.64	42.79	5.13	0.80	0.74	67.33	62.91	32.48	0.26
H	1250	30.78	4.37	17.43	9.80	0.12	0.57	84.45	95.91	32.65	0.17
I	1650	41.33	20.77	63.14	1.22	0.02	0.97	59.02	100.00	31.11	0.60
	total gas age		n=9		29.71	0.36				36.58	3.28
	plateau		n=6	steps C-H	25.46	0.38			85.71	32.70	0.30

"19-135-1, groundmass, 46.98 mg,  J=0.0006995±0.11%, D=1.0069±0.001, NM-137,  Lab#=52211-01"												
A	625	16843.42	2.35	55692.38	0.13	0.22	57.35	2.29	0.42	432.55	1459.77	
B	700	465.33	1.58	1467.20	0.79	0.32	5.41	6.86	3.01	39.87	30.81	
C	750	215.18	1.18	648.33	0.81	0.43	2.93	11.01	5.68	29.69	12.37	
D	800	163.05	1.13	467.56	1.25	0.45	1.27	15.32	9.77	31.28	5.93	
E	875	133.10	1.35	358.88	2.63	0.38	1.77	20.40	18.40	33.99	1.70	
F	975	56.42	0.92	101.80	2.42	0.55	0.74	46.82	26.36	33.06	0.62	
G	1075	52.82	0.58	89.14	4.40	0.87	0.52	50.22	40.81	33.19	0.39	
H	1250	33.48	1.88	25.23	16.12	0.27	0.47	78.20	93.75	32.79	0.16	
I	1650	49.50	20.67	89.23	1.90	0.02	0.95	50.19	100.00	31.66	0.58	
	total gas age		n=9		30.45	0.39				34.63	7.90	
	plateau		n=7	steps B-H	28.42	0.41			93.33	32.86	0.21	
												
"19-137-1 gm B:1:137, groundmass, 47.52 mg,  J=0.0006997±0.11%, D=1.0069±0.001, NM-137,  Lab#=52208-01"												
A	625	736.48	0.48	2446.12	1.26	1.07	4.35	1.86	2.10	17.21	9.95	
B	700	139.95	0.28	451.65	2.58	1.81	0.98	4.65	6.41	8.21	1.84	
C	750	95.08	0.85	300.17	2.85	0.60	1.20	6.79	11.17	8.14	1.20
D	800	69.12	1.35	209.43	4.08	0.38	1.04	10.63	17.98	9.27	0.72
E	875	42.99	0.57	121.42	5.47	0.90	0.56	16.64	27.11	9.01	0.46
F	975	26.60	0.22	66.27	6.20	2.27	0.74	26.45	37.46	8.86	0.30
G	1075	19.40	0.24	42.69	8.64	2.15	0.56	35.10	51.88	8.58	0.17
H	1250	17.05	2.76	34.97	27.74	0.18	0.69	40.73	98.21	8.77	0.12
I	1650	54.38	9.19	160.66	1.07	0.06	0.39	14.09	100.00	9.73	0.90
	total gas age		n=9		59.88	0.87				8.95	0.56
	plateau		n=8	steps A-H	58.81	0.88			98.21	8.74	0.15
											
"19-141-2B gm B:2:137, groundmass, 49.83 mg,  J=0.0006999±0.11%, D=1.0069±0.001, NM-137,  Lab#=52209-01"											
A	625	182.59	0.09	580.70	3.89	5.53	1.28	6.02	5.38	13.83	2.09
B	700	22.25	0.09	45.53	13.14	5.79	0.54	39.57	23.51	11.08	0.18
C	750	14.52	0.14	24.86	5.29	3.75	0.57	49.48	30.83	9.05	0.19
D	800	12.05	0.20	21.44	3.54	2.60	0.28	47.57	35.71	7.23	0.23
E	875	11.08	0.29	18.02	5.26	1.74	0.47	52.16	42.98	7.29	0.16
F	975	11.77	0.26	20.37	7.97	1.96	0.36	49.07	53.98	7.28	0.14
G	1075	17.48	0.17	36.39	10.80	3.09	0.70	38.56	68.90	8.49	0.15
H	1250	18.14	0.27	34.08	20.08	1.86	0.62	44.61	96.63	10.19	0.13
I	1650	47.59	1.11	88.39	2.44	0.46	0.76	45.31	100.00	27.05	0.49
	total gas age		n=9		72.41	3.08				10.10	0.27
	plateau		n=3	steps D-F	16.77	2.02			23.16	7.27	0.10

"20-49.2, groundmass, 42.43 mg (mixture),  J=0.0007078±0.11%, D=1.0069±0.001, NM-137,  Lab#=52291-01"											
A	625	361.71	0.36	1220.18	0.13	1.42	1.39	0.32	0.20	1.50	11.70
B	700	3.04	0.23	9.75	5.20	2.23	0.63	5.83	7.94	0.23	0.09
C	750	2.23	0.20	6.87	4.70	2.50	0.54	9.88	14.95	0.28	0.07
D	800	1.64	0.18	4.92	8.60	2.91	0.48	12.09	27.76	0.25	0.05
E	875	1.49	0.16	4.18	16.86	3.24	0.53	17.79	52.87	0.34	0.03
F	975	2.79	0.16	8.63	13.61	3.10	0.54	9.16	73.14	0.33	0.05
G	1075	10.49	0.24	35.41	7.39	2.09	0.50	0.47	84.14	0.06	0.13
H	1250	15.11	1.71	47.76	6.77	0.30	0.95	7.51	94.23	1.45	0.22
I	1650	20.36	2.73	67.89	3.87	0.19	1.11	2.57	100.00	0.67	0.27
	total gas age		n=9		67.15	2.44				0.42	0.11
	plateau		n=5	steps B-F	48.97	2.96			72.94	0.31	0.04














"Table S2. continued 40Ar/39Ar step-heating results for groundmass concentrate, biotite and hornblende samples."											
ID	Temp	40Ar/39Ar	37Ar/39Ar	36Ar/39Ar	39ArK 	K/Ca	Cl/K	40Ar*	39Ar	Age	±2s
	(°C)			(x 10-3)  	(x 10-15 mol)		(x 10-3)  	(%)	(%)	(Ma)	(Ma)


"3-89, groundmass, 33.31 mg,  J=0.0007034±0.11%, D=1.0069±0.001, NM-137,  Lab#=52224-01"											
A	625	3542.74	0.25	11976.34	0.02	2.04	3.76	0.11	0.04	4.75	419.45
B	700	5.79	0.22	18.85	1.87	2.30	0.85	4.16	3.81	0.31	0.16
C	750	2.17	0.18	6.65	1.97	2.88	0.61	10.27	7.78	0.28	0.13
D	800	1.41	0.16	4.40	4.40	3.20	0.51	8.70	16.63	0.16	0.06
E	875	1.07	0.15	3.01	9.06	3.46	0.38	17.72	34.85	0.24	0.03
F	975	1.21	0.16	3.47	14.96	3.12	0.46	16.60	64.93	0.26	0.02
G	1075	5.40	0.28	17.81	9.05	1.82	0.47	3.03	83.13	0.21	0.09
H	1250	13.34	1.03	44.72	6.31	0.50	0.56	1.56	95.82	0.27	0.21
I	1650	14.30	3.68	47.98	2.08	0.14	1.01	2.97	100.00	0.54	0.28
	total gas age		n=9		49.73	2.46				0.25	0.27
	plateau		n=7	steps B-H	47.63	2.56			95.77	0.24	0.03

"19-141-2A bi, A1:137, 8.54 mg biotite,  J=0.0006943±0.11%, D=1.0069±0.001, NM-137,  Lab#=52192-01"											
A	650	586.19	0.18	1969.12	0.22	2.82	3.33	0.74	0.91	5.41	11.73
B	750	130.66	0.34	424.01	0.56	1.51	1.91	4.13	3.20	6.74	2.06
C	850	26.21	0.05	70.74	1.49	10.89	0.67	20.25	9.28	6.64	0.48
D	920	12.52	0.03	24.21	1.94	19.70	0.51	42.88	17.22	6.71	0.20
E	1000	12.68	0.03	24.07	2.50	16.33	0.59	43.92	27.45	6.96	0.19
F	1075	13.02	0.05	25.86	2.85	11.02	0.68	41.35	39.11	6.73	0.17
G	1110	13.54	0.05	27.76	1.63	10.92	0.54	39.44	45.77	6.68	0.24
H	1180	10.93	0.07	18.84	2.27	6.88	0.14	49.12	55.05	6.71	0.19
I	1210	7.51	0.09	6.78	1.97	5.72	0.64	73.44	63.09	6.90	0.10
J	1250	6.51	0.08	3.33	4.33	6.41	0.47	84.98	80.79	6.92	0.06
K	1300	6.02	0.02	1.72	4.41	31.02	0.68	91.56	98.84	6.90	0.05
L	1650	15.70	0.13	32.99	0.28	3.83	0.20	37.97	100.00	7.45	0.66
	total gas age		n=12		24.46	13.85				6.81	0.31
	plateau		n=11	steps B-L	24.24	13.95			99.09	6.88	0.06

"19-141-2b bi, A3:137, 10.46 mg biotite,  J=0.0006941±0.11%, D=1.0069±0.001, NM-137,  Lab#=52194-02"											
A	650	2170.82	0.27	7395.49	0.03	1.88	-7.44	-0.67	0.11	-18.29	123.60
B	750	272.49	0.04	909.51	0.80	13.88	0.76	1.37	2.75	4.67	3.54
C	850	46.53	0.02	137.92	1.58	27.33	0.66	12.42	7.95	7.22	0.67
D	920	11.42	0.01	19.91	3.07	50.25	0.61	48.48	18.04	6.92	0.16
E	1000	10.47	0.01	16.54	3.02	42.63	0.55	53.34	27.99	6.98	0.14
F	1075	10.00	0.01	15.79	2.92	43.96	0.67	53.38	37.58	6.67	0.15
G	1110	8.94	0.03	11.44	2.03	18.24	0.65	62.22	44.25	6.95	0.14
H	1180	8.02	0.02	8.46	2.90	25.04	0.84	68.85	53.78	6.90	0.10
I	1210	7.09	0.02	5.39	2.13	33.93	0.85	77.56	60.78	6.88	0.12
J	1250	6.28	0.01	2.45	4.41	64.56	0.57	88.46	75.28	6.94	0.06
K	1300	5.92	0.00	1.45	7.17	104.07	0.63	92.80	98.87	6.87	0.04
L	1650	11.21	0.19	18.20	0.34	2.69	0.15	52.17	100.00	7.31	0.57
	total gas age		n=12		30.40	55.24				6.82	0.36
	plateau		n=12	steps A-L	30.40	55.24			100.00	6.89	0.05

"20-49-3 bi, A5:137, 8.96 mg biotite,  J=0.0006929±0.11%, D=1.0069±0.001, NM-137,  Lab#=52196-01"											
A	650	64.24	0.13	213.35	0.21	4.01	1.82	1.88	0.86	1.51	1.97
B	750	19.79	0.16	64.88	0.30	3.19	0.27	3.20	2.09	0.79	0.76
C	850	13.57	0.12	45.31	0.36	4.33	-0.22	1.36	3.53	0.23	0.69
D	920	9.73	0.07	30.45	0.37	7.32	1.28	7.56	5.05	0.92	0.56
E	1000	5.58	0.04	17.83	0.71	12.40	0.86	5.69	7.94	0.40	0.34
F	1075	4.95	0.04	15.95	1.15	12.04	0.47	4.82	12.58	0.30	0.18
G	1110	4.63	0.04	14.49	1.07	12.28	0.47	7.67	16.89	0.44	0.20
H	1180	5.72	0.08	17.78	4.47	6.18	0.48	8.23	35.00	0.59	0.12
I	1210	3.15	0.10	9.59	5.40	5.19	0.64	10.37	56.85	0.41	0.08
J	1250	1.92	0.19	5.10	8.03	2.68	0.44	22.38	89.37	0.54	0.04
K	1300	1.60	0.22	4.17	2.47	2.31	0.65	24.22	99.39	0.48	0.08
L	1650	14.31	0.19	46.24	0.15	2.64	2.97	4.63	100.00	0.83	1.21
	total gas age		n=12		24.68	5.07				0.51	0.14
	plateau		n=5	steps G-K	21.43	4.48			86.81	0.51	0.06















"Table S2. continued 40Ar/39Ar step-heating results for groundmass concentrate, biotite and hornblende samples."											
ID	Temp	40Ar/39Ar	37Ar/39Ar	36Ar/39Ar	39ArK 	K/Ca	Cl/K	40Ar*	39Ar	Age	±2s
	(°C)			(x 10-3)  	(x 10-15 mol)		(x 10-3)  	(%)	(%)	(Ma)	(Ma)
"BG-4 84-2A bi,F14:137, 9.88 mg biotite,  J=0.0007058±0.11%, D=1.0069±0.001, NM-137,  Lab#=52245-01"											
A	650	885.40	0.91	2994.13	0.15	0.56	5.02	0.08	0.52	0.91	25.61
B	750	92.22	1.79	300.03	0.31	0.29	0.33	4.02	1.61	4.72	2.17
C	850	33.68	0.34	101.46	0.57	1.49	1.08	11.05	3.62	4.74	0.70
D	920	12.16	0.06	23.49	1.49	8.71	0.55	42.94	8.83	6.64	0.27
E	1000	8.15	0.03	8.49	4.16	17.96	0.50	69.23	23.37	7.17	0.08
F	1075	7.63	0.05	6.65	6.13	11.30	0.64	74.31	44.74	7.21	0.07
G	1110	8.77	0.07	10.73	2.50	7.65	0.62	63.94	53.47	7.13	0.13
H	1180	8.50	0.13	10.06	2.59	4.06	0.59	65.14	62.50	7.04	0.12
I	1210	7.41	0.12	6.49	2.15	4.33	0.45	74.25	70.02	7.00	0.08
J	1250	6.88	0.25	4.64	3.21	2.05	0.80	80.35	81.21	7.02	0.08
K	1300	6.35	0.05	2.94	4.75	9.64	0.50	86.41	97.79	6.97	0.05
L	1650	10.23	0.18	16.06	0.63	2.80	0.67	53.75	100.00	6.99	0.27
	total gas age		n=12		28.66	8.77				6.96	0.26
	plateau		n=8	steps E-L	26.13	9.08			91.17	7.06	0.08

"BG-4 84-2b bi, A8:137, 4.01 mg biotite,  J=0.0006913±0.11%, D=1.0069±0.001, NM-137,  Lab#=52199-01"											
A	650	1447.11	0.72	4879.16	0.03	0.71	4.66	0.37	0.32	6.70	87.41
B	750	40.34	0.79	123.60	0.21	0.65	0.64	9.62	2.42	4.83	1.82
C	850	41.33	0.45	123.46	0.20	1.14	0.47	11.81	4.43	6.08	1.44
D	920	14.18	0.10	28.65	0.46	5.17	0.63	40.34	9.10	7.12	0.57
E	1000	8.05	0.04	6.98	1.32	11.58	0.69	74.44	22.38	7.46	0.15
F	1075	7.77	0.06	6.50	2.05	8.29	0.56	75.35	42.99	7.28	0.13
G	1110	7.89	0.10	7.16	0.96	5.13	0.86	73.29	52.69	7.20	0.18
H	1180	8.87	0.15	9.93	1.10	3.47	0.30	67.07	63.77	7.41	0.21
I	1210	7.76	0.18	6.04	0.93	2.85	1.16	77.22	73.13	7.46	0.19
J	1250	7.43	0.36	5.49	1.25	1.43	0.32	78.58	85.69	7.27	0.14
K	1300	6.50	0.11	2.50	1.07	4.82	0.84	88.76	96.43	7.18	0.17
L	1650	10.91	0.14	17.73	0.36	3.61	1.10	52.09	100.00	7.08	0.54
	total gas age		n=12		9.94	5.50				7.22	0.53
	plateau		n=10	steps C-L	9.70	5.62			97.58	7.31	0.10

"19-57-2 hbl, A6:137, 22.18 mg hbl,  J=0.0006923±0.11%, D=1.0069±0.001, NM-137,  Lab#=52197-01"											
A	800	54.10	0.35	124.94	0.28	1.46	1.21	31.81	2.85	21.38	1.50
B	850	4.70	0.22	9.21	0.20	2.36	0.80	42.52	4.89	2.50	0.68
C	950	13.65	0.44	33.47	0.17	1.16	1.92	27.81	6.66	4.74	1.04
D	1020	53.29	1.20	159.83	0.07	0.42	1.08	11.56	7.41	7.69	2.84
E	1080	85.95	2.07	258.66	0.05	0.25	3.68	11.27	7.91	12.07	4.78
F	1120	40.02	2.97	95.94	0.06	0.17	2.58	29.77	8.52	14.86	3.11
G	1160	21.00	4.12	62.76	0.52	0.12	0.92	13.31	13.90	3.50	0.72
H	1200	7.17	4.35	22.57	2.16	0.12	0.67	12.00	36.25	1.08	0.22
I	1300	3.39	5.35	9.14	6.08	0.10	1.06	33.49	99.00	1.43	0.07
J	1400	27.40	87.26	98.99	0.06	0.01	14.24	19.60	99.65	7.26	2.91
K	1650	47.82	10.81	149.30	0.03	0.05	1.37	9.62	100.00	5.79	4.95
	total gas age		n=11		9.69	0.21				2.34	0.30
	plateau		n=2	steps H-I	8.24	0.10			85.10	1.40	0.21

"19-141-1 hbl, M3:137, 21.70 mg,  J=0.0007079±0.11%, D=1.0069±0.001, NM-137,  Lab#=52289-01"											
A	800	2353.10	5.99	8085.04	0.02	0.09	7.62	-1.51	0.17	-46.21	237.59
B	850	987.60	26.03	3431.33	0.02	0.02	-0.52	-2.45	0.30	-31.93	83.33
C	950	104.14	5.11	326.35	0.02	0.10	5.82	7.80	0.47	10.39	10.52
D	1020	36.47	3.17	123.36	0.03	0.16	-2.96	0.75	0.68	0.35	6.36
E	1080	40.30	2.44	125.25	0.03	0.21	-1.71	8.67	0.96	4.46	5.12
F	1120	33.30	2.71	96.74	0.04	0.19	-0.11	14.82	1.28	6.31	3.94
G	1160	13.82	3.31	31.96	0.28	0.15	1.11	33.62	3.54	5.94	0.75
H	1200	8.88	3.48	13.13	0.93	0.15	0.53	59.57	11.05	6.77	0.25
I	1300	6.27	3.70	4.49	10.71	0.14	0.64	83.73	97.70	6.71	0.05
J	1400	15.08	4.23	34.77	0.20	0.12	-0.63	34.17	99.30	6.59	0.92
K	1650	25.92	7.18	73.93	0.09	0.07	-0.09	18.00	100.00	5.99	2.19
	total gas age		n=11		12.36	0.14				6.54	0.67
	plateau		n=5	steps G-K	12.20	0.14			98.72	6.71	0.06
















"Table S2. continued 40Ar/39Ar step-heating results for groundmass concentrate, biotite and hornblende samples."											
ID	Temp	40Ar/39Ar	37Ar/39Ar	36Ar/39Ar	39ArK 	K/Ca	Cl/K	40Ar*	39Ar	Age	±2s
	(°C)			(x 10-3)  	(x 10-15 mol)		(x 10-3)  	(%)	(%)	(Ma)	(Ma)
"3-87 hbl, A4:137, 14.71 mg hbl,  J=0.0006937±0.11%, D=1.0069±0.001, NM-137,  Lab#=52195-01"											
A	800	65.19	0.78	194.83	0.27	0.66	1.48	11.79	3.73	9.60	1.86
B	850	24.27	0.42	55.65	0.19	1.22	0.45	32.39	6.42	9.82	1.25
C	950	16.92	0.59	31.62	0.25	0.87	0.90	45.05	9.85	9.52	0.80
D	1020	29.85	0.78	47.12	0.14	0.66	0.43	53.57	11.78	19.92	1.40
E	1080	32.35	0.97	46.70	0.12	0.53	0.89	57.59	13.47	23.19	1.52
F	1120	37.79	2.37	96.60	0.18	0.22	-1.40	24.97	15.96	11.79	1.33
G	1160	16.71	3.79	50.51	0.99	0.13	0.78	12.54	29.68	2.63	0.38
H	1200	21.69	4.20	70.98	1.89	0.12	1.07	4.91	55.92	1.34	0.37
I	1300	6.41	4.81	14.59	2.69	0.11	1.18	38.92	93.31	3.13	0.14
J	1400	31.91	4.49	26.68	0.25	0.11	1.36	76.46	96.84	30.39	0.77
K	1650	31.08	1.04	20.88	0.23	0.49	0.90	80.43	100.00	31.04	0.79
	total gas age		n=11		7.21	0.22				5.96	0.47
	plateau		n=3	steps G-I	5.57	0.12			77.35	2.86	0.83

"3-88 hbl, A7:137, 12.78 mg hbl,  J=0.0006918±0.11%, D=1.0069±0.001, NM-137,  Lab#=52198-01"											
A	800	65.54	1.19	220.82	0.26	0.43	0.82	0.59	4.66	0.48	1.78
B	850	7.64	0.49	26.77	0.33	1.03	1.30	-2.98	10.51	-0.28	0.54
C	950	4.83	0.58	17.08	0.41	0.87	0.18	-3.61	17.72	-0.22	0.41
D	1020	8.04	0.86	24.45	0.25	0.60	1.41	11.05	22.12	1.11	0.63
E	1080	17.09	1.54	57.20	0.09	0.33	1.99	1.85	23.65	0.40	1.81
F	1120	24.57	2.28	87.56	0.05	0.22	3.59	-4.53	24.59	-1.39	2.56
G	1160	32.51	3.47	105.93	0.23	0.15	0.77	4.59	28.69	1.87	1.23
H	1200	25.11	4.06	86.25	0.85	0.13	0.37	-0.16	43.73	-0.05	0.59
I	1300	7.76	5.21	26.50	3.14	0.10	1.08	4.59	99.41	0.45	0.15
J	1400	82.65	24.96	284.75	0.02	0.02	-2.41	0.69	99.81	0.73	9.48
K	1650	138.10	14.42	493.24	0.01	0.04	1.57	-4.68	100.00	-8.19	24.86
	total gas age		n=11		5.65	0.26				0.34	0.53
	plateau		n=6	steps D-I	4.61	0.14			81.69	0.46	0.28

"BG-4 86-3 hbl, A2:137, 21.26 mg hbl,  J=0.0006943±0.11%, D=1.0069±0.001, NM-137,  Lab#=52193-01"											
A	800	428.65	1.67	1433.81	0.05	0.31	4.79	1.19	0.56	6.38	17.46
B	850	532.99	3.08	1838.25	0.01	0.17	-44.20	-1.87	0.62	-12.56	142.57
C	950	241.25	4.16	762.08	0.01	0.12	-9.50	6.80	0.70	20.50	48.60
D	1020	104.73	4.43	343.74	0.01	0.12	-1.00	3.36	0.79	4.42	23.52
E	1080	51.85	4.58	151.29	0.02	0.11	0.06	14.52	1.06	9.44	7.01
F	1120	24.32	4.75	64.39	0.06	0.11	-2.70	23.38	1.71	7.14	2.45
G	1160	10.05	4.77	17.54	0.31	0.11	0.80	52.35	5.35	6.60	0.42
H	1200	9.18	4.68	14.45	1.55	0.11	0.90	57.67	23.41	6.64	0.18
I	1300	6.21	4.73	4.31	6.37	0.11	0.81	85.81	97.47	6.69	0.05
J	1400	14.45	5.06	34.07	0.16	0.10	-0.54	33.24	99.36	6.03	1.06
K	1650	36.58	4.33	107.16	0.05	0.12	-2.47	14.41	100.00	6.62	2.81
	total gas age		n=11		8.60	0.11				6.67	0.40
	plateau		n=5	steps F-J	8.45	0.11			98.30	6.68	0.06

Notes:
"Isotopic ratios corrected for blank, radioactive decay, and mass discrimination, not corrected for interferring reactions."
Individual analyses show analytical error only; plateau and total gas age errors include error in J and irradiation parameters.
Analyses in italics are excluded from final age calculations.
Discrimination = 1.00684±0.00098 a.m.u.
†=analyses excluded from plateau weighted mean age.
ø=analyses excluded from inverse isochron age.
K/Ca = molar ratio calculated from reactor produced 39ArK and 37ArCa.
* 2s error
** MSWD outside of 95% confidence interval