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Table T9. Igneous unit and contacts log, Hole 1256C.

Unit/Subunit
Upper contact
Minimum
thickness (m)
Rock type
Core, section
Piece
Depth
(mbsf)
Type

206-1256C-



S1
4R-1
1
245.025
NR
0.16
Chert
1
4R-2
5
245.185
NR
3.8
Sheet flows
S2
5R-1
1
252.415
NR
0.03
Chert
2
5R-3
5
255.93
NR
0.35
Sheet flows
3
6R-1
4
257.26
NR
0.29
Sheet flows
4
6R-1
7
257.55
C
0.28
Sheet flows
S3
6R-1
12
257.83
NR
0.17
Sediment
5
6R-1
15
347.1
NR
1.17
Sheet flows
6
6R-2
11
259.17
C
3.44
Sheet flows
7
6R-5
2
262.61
NR
1.01
Sheet flows
8
7R-1
2
266.4
NR
0.5
Sheet flows
9
7R-1
11
266.9
C
0.76
Sheet flows
10
7R-2
1
267.66
C
0.63
Sheet flows
11a
7R-2
4
268.29
C
0.28
Sheet flows
11b
7R-2
7
268.57
C
0.1
Sheet flows
11c
7R-2
11
268.67
C
1.35
Sheet flows
11 (total)


1.73
Sheet flows
12
7R-3
6
270.02
NR
0.39
Sheet flows
13
7R-4
3
270.41
C
0.2
Sheet flows
14
7R-5
1
270.61
C
1.21
Sheet flows
15
7R-5
2
271.82
NR
2.63
Sheet flows
16
8R-2
3
277.75
C
0.97
Sheet flows
17
8R-3
9
278.72
NR
1.55
Sheet flows
18a
8R-4
3
280.27
C
0.72
Flow margin
18b
8R-5
4
280.99
GS
4.03
Massive flow
18c
9R-3
1
287.17
GS
5.8
Massive flow
18d
9R-7
1
292.97
GS
1.67
Massive flow
18e
10R-1
1
293.9
GS
3.31
Massive flow
18f
10R-3
2
297.21
GS
0.08
Massive flow
18g
10R-3
4
297.29
GS
3.46
Massive flow
18h
11R-1
1
300.75
GS
7.46
Massive flow
18i
11R-6
1f
311.83
GS
2.75
Flow margin
18 (total)


29.28
Massive flow
19
12R-1
1
312.8
NR
0.48
Sheet flows
20a
12R-1
4
313.28
C
0.13
Sheet flows
20b
12R-1
5
313.41
GS
0.25
Sheet flows
20c
12R-1
7
313.66
GS
0.38
Sheet flows
20 (total)


0.76
Sheet flows
21a
12R-1
11
314.04
C
0.58
Sheet flows
21b
12R-2
2
314.62
C
1.33
Sheet flows
21 (total)


1.91
Sheet flows
22
12R-3
3
315.95
C
1.45
Flow margin

Note: C = chilled margin, NR = not recovered, GS = gradational change in grain size.

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