Table T4. Division of the basement sequence into units and subunits with names and curated thickness, Site 1203.
Unit/Subunit
Core,
section
Depth
(mbsf)
Unit name
Curated
thickness
(m)

197-1203A-

1 17R-4 457.56 Highly plagioclase-olivine-phyric basalt 7.95
2 18R-2 465.51 Calcareous interbed 0.10
3 18R-2 465.61 Highly plagioclase-olivine-phyric basalt 24.60
4a 20R-6 490.21 Nannofossil-silty-chalk 0.31
4b 20R-6 490.52 Resedimented basalt-tuff 0.42
4c 20R-6 490.94 Basalt-tuff? 1.66
4d 21R-1 492.60 Resedimented basalt-tuff 0.19
4e 21R-1 492.79 Resedimented synvolcanic basalt-tuff 0.70
4f 21R-1 493.49 Basalt-tuff 3.18
4g 21R-3 496.67 Laminated basalt-tuff 0.43
4h 21R-4 497.10 Basalt-tuff 11.24
4i 22R-5 508.34 Resedimented synvolcanic basalt-tuff 5.64
4j 23R-2 513.98 Laminated-bedded vitric siltstone-sandstone 2.19
4k 23R-3 516.17 Resedimented basalt-tuff 6.52
4l 24R-2 522.69 Basalt lapilli-tuff 0.25
4m 24R-2 522.94 Resedimented basalt-tuff 8.19
5 25R-1 531.13 Moderately plagioclase-olivine-phyric basalt 1.94
6 25R-2 533.07 Sparsely plagioclase-phyric basalt 4.78
7a 26R-4 537.85 Bedded vitric siltstone-sandstone 23.72
7b 29R-1 561.57 Laminated volcaniclastic siltstone-sandstone 3.21
7c 29R-4 564.78 Basalt hyaloclastite-tuff 5.37
7d 30R-1 570.15 Hyaloclastite-tuff 0.15
8 30R-1 570.30 Highly plagioclase-olivine-phyric basalt 18.70
9 32R-1 589.00 Basalt-lapilli-tuff 0.77
10 32R-1 589.77 Bedded volcaniclastic siltstone-sandstone 0.56
11 32R-2 590.33 Olivine-plagioclase-phyric basalt 4.58
12 32R-5 594.91 Bedded volcaniclastic siltstone-sandstone 7.76
13 33R-CC 602.67 Plagioclase-basalt hyaloclastite breccia 13.58
14 35R-4 616.25 Moderately plagioclase-phyric basalt 9.49
15a 36R-7 625.74 Bedded vitric siltstone-sandstone 1.76
15b 37R-1 627.50 Calcareous vitric siltstone-sandstone 0.79
16 37R-1 628.29 Aphyric to highly-olivine-phyric basalt 10.37
17 38R-2 638.66 Bedded olivine-plagioclase-basalt hyaloclastite tuff 12.71
18 39R-4 651.37 Moderately plagioclase-olivine-phyric basalt 14.57
19 41R-1 665.94 Vesicular moderately olivine-phyric basalt 19.63
20 43R-1 685.57 Moderately olivine-phyric basalt 36.73
21 47R-1 722.30 Moderately olivine-phyric basalt 19.05
22a 49R-7 741.01 Volcaniclastic vitric-lithic sandstone 0.25
22b 50R-1 741.60 Basalt-lapillistone 13.78
23 51R-3 755.38 Vesicular sparsely olivine-plagioclase-phyric to aphyric basalt 63.39
24 58R-3 818.77 Vesicular aphyric basalt 3.38
25 59R-3 822.15 Basalt hyaloclastite-tuff 0.41
26 59R-3 822.56 Vesicular aphyric basalt 40.55
27 63R-5 863.11 Volcaniclastic sandstone 3.53
28 64R-1 866.64 Volcaniclastic breccia 10.78
29 65R-1 877.42 Vesicular aphyric basalt 8.38
30 66R-1 885.80 Vesicular, sparsely plagioclase-phyric basalt 23.76
31a 68R-4 909.56 Basalt hyaloclastite-tuff 0.10
31b 68R-4 909.66 Highly plagioclase-phyric basalt 0.20
Bottom of hole: 914.60 Total: 452.30