Table T2.

Table T2. Radionuclide data used for age calculations.

Sample Leg, hole, core,
section, interval (cm) Depth
(mbsf) ²³⁴U/²³⁸U ²³⁰Th/²³⁴U ²³¹Pa/²³⁵U Age
(ka)

²³⁰Th/²³⁴U ²³¹Pa/²³⁵U

1
139-856D-1H-1, 27-30
0.28
1.11 ± 0.06
0.08 ± 0.01
0.16 ± 0.01
8.6 ^+0.8_-0.7
8.2 ± 0.7

2
139-856G-1R-3, 94-96
3.95
1.13 ± 0.13
0.08 ± 0.01
0.19 ± 0.02
9.1^+0.8_-0.7
9.8 ± 1.1

3
139-856G-4R-1, 116-118
28.17
1.11 ± 0.08
0.22 ± 0.01

27.2^+3.1_-2.6

4
139-856G-6R-3, 41-43
55.30
1.04 ± 0.08
0.62 ± 0.04

104.3^+16.2_-131.0

5
139-856G-7R-4, 41-43
60.52
1.14 ± 0.04
1.02 ± 0.06

>300

6
139-856H-1R-3, 51-57
3.54
1.21 ± 0.03
0.10 ± 0.003

11.6^+0.4_-0.4

7
139-856H-2R-1, 36-38
13.87
1.16 ± 0.06
0.16 ± 0.01
0.24 ± 0.03
18.7^+1.8_-1.4
13.2 ± 1.6

8
139-856H-15R-1, 68-70
81.19
1.07 ± 0.05
0.71 ± 0.04
0.71 ± 0.04
130.0^+20.0_-15.5
57.9 ± 3.6

10
169-1035C-4X-1, 6-12
29.76
1.18 ± 0.09
0.46 ± 0.03
0.48 ± 0.09
65.2^+10.1_-8.5
31.2 ± 5.9

11
169-1035C-5X-1, 6-19
39.40
1.17 ± 0.10
0.57 ± 0.04
1.09 ± 0.10
89.5^+12.5_-10.6
>120

12
169-1035D-7X-CC, 21-24
48.31
1.12 ± 0.09
0.77 ± 0.03
0.60 ± 0.08
153.5^+20.5_-17.0
43.5 ± 5.9

13
169-1035D-10X-1, 77-79
67.30
1.12 ± 0.09
0.75 ± 0.03
0.76 ± 0.10
142.5^+12.5_-11.3
67.6 ± 8.6

14
169-1035F-3R-1, 5-6
22.55
1.08 ± 0.09
0.65 ± 0.06
0.77 ± 0.06
112.4^+29.1_-20.4
68.9 ± 5.5

15
169-1035F-5R-1, 6-7
41.8
1.14 ± 0.06
0.71 ± 0.03
0.76 ± 0.05
129.5^+15.5_-13.0
66.9 ± 4.7

16
169-1035F-6R-1, 1-3
51.41
1.10 ± 0.07
0.70 ± 0.04

127.5^+19.5_-15.1

17
169-1035F-8R-1, 75-77
71.35
1.05 ± 0.05
0.78 ± 0.04
1.10 ± 0.06
161.0^+36.0_-24.5
>120

18
169-1035G-2R-1, 4-6
44.44
1.25 ± 0.12
1.04 ± 0.10

>300

20
169-1035H-2R-1, 26-29
9.06
1.17 ± 0.11
0.34 ± 0.07

44.5^+16.3_-12.4

21
169-1035H-9R-1, 39-43
74.99
1.04 ± 0.13
0.82 ± 0.08

182.0^+92.0_-44.0

22
169-1035H-15R-1, 6-8
127.66
1.07 ± 0.01
0.86 ± 0.09
0.33 ± 0.06
206.0^+95.0_-50.0
19.1 ± 3.2

23
169-1035H-16R-1, 74-77
133.34
1.09 ± 0.07
0.68 ± 0.07

121.0^+37.0_-24.5

24
169-1035H-19R-1, 49-53
161.99
1.09 ± 0.07
0.97 ± 0.07

>300

Sample	Leg, hole, core, section, interval (cm)	Depth (mbsf)	²³⁴U/²³⁸U	²³⁰Th/²³⁴U	²³¹Pa/²³⁵U	Age (ka)
²³⁰Th/²³⁴U	²³¹Pa/²³⁵U
1	139-856D-1H-1, 27-30	0.28	1.11 ± 0.06	0.08 ± 0.01	0.16 ± 0.01	8.6 ^+0.8_-0.7	8.2 ± 0.7
2	139-856G-1R-3, 94-96	3.95	1.13 ± 0.13	0.08 ± 0.01	0.19 ± 0.02	9.1^+0.8_-0.7	9.8 ± 1.1
3	139-856G-4R-1, 116-118	28.17	1.11 ± 0.08	0.22 ± 0.01		27.2^+3.1_-2.6
4	139-856G-6R-3, 41-43	55.30	1.04 ± 0.08	0.62 ± 0.04		104.3^+16.2_-131.0
5	139-856G-7R-4, 41-43	60.52	1.14 ± 0.04	1.02 ± 0.06		>300
6	139-856H-1R-3, 51-57	3.54	1.21 ± 0.03	0.10 ± 0.003		11.6^+0.4_-0.4
7	139-856H-2R-1, 36-38	13.87	1.16 ± 0.06	0.16 ± 0.01	0.24 ± 0.03	18.7^+1.8_-1.4	13.2 ± 1.6
8	139-856H-15R-1, 68-70	81.19	1.07 ± 0.05	0.71 ± 0.04	0.71 ± 0.04	130.0^+20.0_-15.5	57.9 ± 3.6
10	169-1035C-4X-1, 6-12	29.76	1.18 ± 0.09	0.46 ± 0.03	0.48 ± 0.09	65.2^+10.1_-8.5	31.2 ± 5.9
11	169-1035C-5X-1, 6-19	39.40	1.17 ± 0.10	0.57 ± 0.04	1.09 ± 0.10	89.5^+12.5_-10.6	>120
12	169-1035D-7X-CC, 21-24	48.31	1.12 ± 0.09	0.77 ± 0.03	0.60 ± 0.08	153.5^+20.5_-17.0	43.5 ± 5.9
13	169-1035D-10X-1, 77-79	67.30	1.12 ± 0.09	0.75 ± 0.03	0.76 ± 0.10	142.5^+12.5_-11.3	67.6 ± 8.6
14	169-1035F-3R-1, 5-6	22.55	1.08 ± 0.09	0.65 ± 0.06	0.77 ± 0.06	112.4^+29.1_-20.4	68.9 ± 5.5
15	169-1035F-5R-1, 6-7	41.8	1.14 ± 0.06	0.71 ± 0.03	0.76 ± 0.05	129.5^+15.5_-13.0	66.9 ± 4.7
16	169-1035F-6R-1, 1-3	51.41	1.10 ± 0.07	0.70 ± 0.04		127.5^+19.5_-15.1
17	169-1035F-8R-1, 75-77	71.35	1.05 ± 0.05	0.78 ± 0.04	1.10 ± 0.06	161.0^+36.0_-24.5	>120
18	169-1035G-2R-1, 4-6	44.44	1.25 ± 0.12	1.04 ± 0.10		>300
20	169-1035H-2R-1, 26-29	9.06	1.17 ± 0.11	0.34 ± 0.07		44.5^+16.3_-12.4
21	169-1035H-9R-1, 39-43	74.99	1.04 ± 0.13	0.82 ± 0.08		182.0^+92.0_-44.0
22	169-1035H-15R-1, 6-8	127.66	1.07 ± 0.01	0.86 ± 0.09	0.33 ± 0.06	206.0^+95.0_-50.0	19.1 ± 3.2
23	169-1035H-16R-1, 74-77	133.34	1.09 ± 0.07	0.68 ± 0.07		121.0^+37.0_-24.5
24	169-1035H-19R-1, 49-53	161.99	1.09 ± 0.07	0.97 ± 0.07		>300

Note: In cases of duplicate and/or triplicate analyses of samples (Table T1), the mean value with the standard deviation was used.