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Table T1. Summary of holes drilled in normal crust in the central and eastern Pacific with an age <100 Ma, full spreading rate >75 mm/yr, and penetration into basement >10 m.

Hole
Leg
Age
(Ma)
Location
Basement penetration
(m)
Sediment thickness
(m)

163
 		DSDP 16
 		72
11°N,150°W
18
176
319A
 		DSDP 34
17
13°S,102°W
59
 		110
320
 		DSDP 34
26
9°S,84°W
29
 		155
420
 		DSDP 54
 		3
9°N,106°W
29
 		118
421
 		DSDP 54
 		3
9°N,106°W
29
 		85
429A
 		DSDP 54
 		5
9°N,107°W
21
 		31
469
 		DSDP 63
 		17
33°N,121°W
58
 		391
470A
 		DSDP 63
 		15
29°N,118°W
48
 		167
471
 		DSDP 63
 		12
23°N,112°W
82
 		741
472
 		DSDP 63
 		15
23°N,114°W
25
 		112
487
 		DSDP 66
13
16°N,99°W
19
171
495
 		DSDP 67
23
12°N,91°W
27
428
597B
 		DSDP 92
 		29
19°S,130°W
25
48
597C†
 		DSDP 92
 		29
19°S,130°W
91
53
599B
 		DSDP 92
 		8
19°S,120°W
10
41
843B‡
 		ODP 136
95(110)**
19°N,159°W
71
243
864A
 		ODP 142
0
10°N,104°W
15
0
1224D*
 		ODP 200
45
28°N,142°W
31
28
1224F
 		ODP 200
45
28°N,142°W
147
28

Notes:
† = a reentry cone was emplaced at this site.
‡ = this is the location of borehole Observatory OSN-1.
* = this is the location of borehole Hawaii-2 Observatory (H2O).
** = basement age is older than overlying sediment.

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