Previous   |    Close   |    Next

Table T2. Summary of lithologic intervals and their classification into units, Hole U1415P.

Unit Description Core, section, interval (cm) Depth (mbsf) Pieces Lithologic interval Contact type Contact definition Complete lithology name Modal grain size Texture
Top Bottom
    345-U1415P-
I Surficial sand
and rubble		 2G-1A, 0–15 8.0 8.2   G1 Not recovered   Silty sand Very fine  
2G-1A, 15–150 8.2 9.5   G2 Color   Silty sand Very fine  
2G-2A, 0–31 9.5 9.8 1 G3 Not recovered   Sand Very fine  
2G-2A, 31–36 9.8 9.9 2 G4 Not recovered   Gabbroic sand Fine to coarse  
2G-2A, 36–52 9.9 10.0 3 G5 Not recovered   Gabbroic rubble Cobbles  
2G-2A, 52–58 10.0 10.1 4 G6 Not recovered   Olivine gabbro Medium grained Poikilitic-granular
2G-2A, 58–61 10.1 10.1 5 G7 Not recovered   Orthopyroxene-bearing
olivine gabbro 		Coarse grained Poikilitic-granular
2G-2A, 61–68 10.1 10.2 6 G8 Not recovered   Sparsely phyric basalt Less than fine grained Aphanitic
II Multitextured
Layered
Gabbro
Series		 3R-1A, 0–30 12.5 12.8 1, 2, 3, 4, 5,
6 		1 Not recovered   Olivine gabbro Medium to coarse
grained 		Granular
3R-1A, 30–34 12.8 12.8 7 2 Not recovered   Olivine gabbro Medium grained Poikilitic-granular
3R-1A, 34–133.5 12.8 13.8 8, 9, 10, 11,
12, 13, 14,
15, 16, 17,
18, 19, 20,
21, 22		 3 Not recovered   Olivine gabbro Coarse grained Granular
4G-1A, 0–3 12.5 12.5 1 G9 Not recovered   Olivine-bearing gabbro Coarse grained Poikilitic-granular
4G-1A, 3–8 12.5 12.6 2 G10 Not recovered   Olivine-bearing gabbro Coarse grained Poikilitic-granular
4G-1A, 8–18 12.6 12.7 3 G11 Not recovered   Orthopyroxene-bearing
olivine gabbro		 Medium grained Granular
4G-1A, 18–29 12.7 12.8 4 G12 Not recovered   Olivine gabbro Coarse grained Granular
4G-1A, 29–37 12.8 12.9 5 G13 Not recovered   Olivine gabbro Coarse grained Granular
4G-1A, 37–50 12.9 13.0 6 G14 Not recovered   Olivine gabbro Coarse grained Granular
4G-1A, 50–62 13.0 13.1 7 G15 Not recovered   Orthopyroxene-bearing
olivine gabbro		 Coarse grained Poikilitic-granular
4G-1A, 62–93 13.1 13.4 8 G16 Not recovered   Olivine gabbro Pegmatitic Poikilitic-granular
4G-1A, 93–110 13.4 13.6 9 G17 Not recovered   Olivine gabbro Coarse grained Poikilitic-granular
4G-1A, 110–126 13.6 13.8 10 G18 Not recovered   Olivine gabbro Coarse grained Poikilitic-granular
4G-1A, 126–141 13.8 13.9 11 G19 Not recovered   Olivine gabbro Coarse grained Poikilitic-granular
4G-2A, 0–21 13.9 14.1 1 G20 Not recovered   Olivine gabbro Coarse grained Granular
4G-2A, 21–24 14.1 14.2 2 G21 Not recovered   Olivine gabbro Coarse grained Granular
4G-2A, 24–35 14.2 14.3 3 G22 Not recovered   Olivine gabbro Coarse grained Granular
5R-1A, 0–142 18.1 19.5 1, 2, 3, 4, 5,
6, 7, 8, 9,
310, 11,
12, 13, 14 		3 Not recovered   Orthopyroxene-bearing
olivine gabbro 		Coarse grained Granular
5R-2A, 0–70.5 19.5 20.2 1, 2, 3, 4, 5,
6, 7 		3 Not recovered   Orthopyroxene-bearing
olivine gabbro 		Coarse grained Granular
6R-1A, 0–26 22.6 22.9 1, 2, 3 3 Not recovered   Orthopyroxene-bearing
olivine gabbro 		Coarse grained Granular
6R-1A, 26–70 22.9 23.3 4, 5, 6, 7 4 Not recovered   Olivine gabbro Medium grained Granular
6R-1A, 70–140.5 23.3 24.0 7, 8, 9, 10 5 Modal and textural Sharp to
gradational		 Olivine gabbro Coarse grained Multitextured
6R-2A, 0–30 24.0 24.3 1, 2, 3 6 Not recovered   Olivine gabbro Coarse grained Poikilitic to granular
6R-2A, 30–58 24.3 24.6 3, 4, 5, 6 7 Modal and textural Sharp to
gradational		 Olivine gabbro Coarse grained Multitextured
6R-2A, 58–118 24.6 25.2 6, 7, 8, 9, 10,
11, 12, 13		 8 Modal and textural Sharp to
gradational		 Troctolitic olivine gabbro Medium grained Multitextured
6R-2A, 118–122 25.2 25.2 14 9 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
6R-2A, 122–131.5 25.2 25.3 15 10 Not recovered   Olivine gabbro Coarse grained Multitextured
7R-1A, 0–14 27.1 27.2 1, 2 11 Not recovered   Olivine gabbro Coarse grained Granular
7R-1A, 14–41 27.2 27.5 2, 3, 4, 5, 6 12 Not recovered   Orthopyroxene bearing
olivine gabbro 		Medium grained Granular
7R-1A, 41–139 27.5 28.5 7, 8, 9, 10,
11, 12, 13		 13 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse to pegmatitic Multitextured
7R-2A, 0–56 28.5 29.1 1, 2 13 Not recovered   Orthopyroxene bearing
olivine gabbro 		Pegmatitic Multitextured
7R-2A, 56–70 29.1 29.2 3, 4 14 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Granular
7R-2A, 70–96.5 29.2 29.5 5, 6, 7, 8 15 Not recovered   Orthopyroxene bearing
olivine gabbro 		Pegmatitic Multitextured
8R-1A, 0–29 31.4 31.7 1, 2 16 Not recovered   Olivine gabbro Coarse grained Granular
8R-1A, 29–146 31.7 32.9 2, 3, 4, 5, 6,
7, 8, 9 		17 Modal and textural Sharp to
gradational		 Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
8R-2A, 0–44.5 32.9 33.3 1, 2, 3 17 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
9R-1A, 0–18 36.4 36.6 1 18 Not recovered   Olivine gabbro Medium grained Granular
9R-1A, 18–141.5 36.6 37.8 2, 3, 4, 5, 6,
7, 8, 9, 10		 19 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse to pegmatitic Multitextured
9R-2A, 0–12 37.8 37.9 1, 2 20 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
9R-2A, 12–70 37.9 38.5 3, 4, 5, 6, 7 21 Not recovered   Orthopyroxene bearing
olivine gabbro 		Medium grained Multitextured
9R-2A, 70–80 38.5 38.6 8 22 Not recovered   Olivine bearing Olivine
gabbro 		Medium grained Granular
10R-1A, 0–55 41.0 41.6 1, 2, 3, 4, 5,
6 		23 Not recovered   Olivine gabbro Medium grained Granular
10R-1A, 55–93 41.6 41.9 7, 8, 9, 10 24 Not recovered   Olivine gabbro Pegmatitic Multitextured
10R-1A, 93–143 41.9 42.4 10, 11, 12,
13, 14		 25 Modal and textural Sharp to
gradational		 Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
10R-2A, 0–21 42.4 42.6 1, 2 25 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
11R-1A, 0–149 45.6 47.1 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12,
13, 14, 15,
16, 17, 18		 25 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
11R-2A, 0–36.5 47.1 47.5 1, 2, 3, 4, 5 25 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
12R-1A, 0–145.5 49.7 51.2 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12,
13, 14, 15		 25 Not recovered   Orthopyroxene bearing
olivine gabbro 		Coarse grained Multitextured
13R-1A, 0–21 54.7 54.9 1, 2 26 Not recovered   Olivine gabbro Medium grained Granular
13R-1A, 21–140.5 54.9 56.1 3, 4, 5, 6, 7,
8, 9, 10,
11, 12		 27 Not recovered   Olivine gabbro Coarse grained Multitextured
13R-2A, 0–113 56.1 57.2 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12 		27 Not recovered   Olivine gabbro Coarse grained Multitextured
14R-1A, 0–93 58.8 59.7 1, 2, 3, 4, 5,
6, 7, 8 		27 Not recovered   Olivine gabbro Coarse grained Multitextured
14R-1A, 93–129 59.7 60.1 9, 10, 11, 12 28 Not recovered   Olivine gabbro Coarse grained Multitextured
14R-2A, 0–47 60.1 60.6 1, 2 28 Not recovered   Olivine gabbro Coarse grained Multitextured
15R-1A, 0–39 63.8 64.2 1, 2, 3, 4, 5,
6 		28 Not recovered   Olivine gabbro Coarse grained Multitextured
III Troctolite
Series		 15R-1A, 39–50 64.2 64.3 7, 8, 9 29 Not recovered   Troctolite Medium grained Granular
16R-1A, 0–126.5 68.0 69.3 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11		 29 Not recovered   Troctolite Medium grained Granular
17R-1A, 0–38.5 73.0 73.4 1, 2, 3, 4, 5 29 Not recovered   Troctolite Medium grained Granular
18R-1A, 0–112 77.3 78.4 1, 2, 3, 4, 5,
6, 7, 8, 9,
10 		29 Not recovered   Troctolite Medium grained Granular
19G-1A, 0–8 72.3 72.4 1 G23 Not recovered   Olivine gabbro Medium grained Granular
19G-1A, 8–12 72.4 72.4 2 G24 Not recovered   Olivine gabbro Coarse grained Multitextured
19G-1A, 12–23 72.4 72.5 3 G25 Not recovered   Orthopyroxene-bearing
olivine gabbro 		Medium to coarse
grained 		Granular
19G-1A, 23–32 72.5 72.6 4 G26 Not recovered   Troctolitic olivine gabbro Medium to coarse
grained 		Granular
19G-1A, 32–37 72.6 72.7 5 G27 Not recovered   Olivine gabbro Pegmatitic Multitextured
19G-1A, 37–41 72.7 72.7 6 G28 Not recovered   Troctolite rubble    
19G-1A, 41–49 72.7 72.8 7 G29 Not recovered   Troctolite Coarse grained Granular
19G-1A, 49–58 72.8 72.9 8 G30 Not recovered   Troctolite Medium to coarse
grained 		Granular
19G-1A, 58–61 72.9 72.9 9 G31 Not recovered   Troctolite Medium grained Granular
19G-1A, 61–65 72.9 73.0 10 G32 Not recovered   Troctolite Medium grained Granular
20R-1A, 0–138 82.3 83.7 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12,
13, 14		 29 Not recovered   Troctolite Medium grained Granular
20R-2A, 0–120.5 83.7 84.9 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11 		29 Not recovered   Troctolite Medium grained Granular
21G-1A, 0–3 79.4 79.4 1 G33 Not recovered   Troctolite Medium to coarse
grained 		Granular
21G-1A, 3–13 79.4 79.5 2 G34 Not recovered   Troctolite Medium grained Granular
21G-1A, 13–18 79.5 79.6 3 G35 Not recovered   Troctolite Medium grained Granular
21G-1A, 18–23 79.6 79.6 4 G36 Not recovered   Troctolite Medium grained Granular
21G-1A, 23–32 79.6 79.7 5 G37 Not recovered   Troctolite Medium grained Granular
22R-1A, 0–140 89.4 90.8 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12,
13, 14		 29 Not recovered   Troctolite Medium grained Granular
22R-2A, 0–113 90.8 91.9 1, 2, 3, 4, 5,
6, 7, 8		 29 Not recovered   Troctolite Medium grained Granular
22R-2A, 113–116 91.9 92.0 8 30 Modal and textural Gradational Olivine gabbro Fine grained Poikilitic-granular
22R-2A, 116–133 92.0 92.1 9, 10, 11 31 Not recovered   Troctolite Medium to coarse
grained 		Granular
22R-3A, 0–55 92.1 92.7 1, 2, 3, 4, 5 31 Not recovered   Troctolite Medium grained Granular
23R-1A, 0–141 98.8 100.2 1, 2, 3, 4, 5,
6, 7, 8, 9,
10, 11, 12,
13, 14, 15,
16, 17, 18		 31 Not recovered   Troctolite Medium grained Granular
23R-2A, 0–75 100.2 101.0 1, 2, 3, 4, 5,
6, 7 		31 Not recovered   Troctolite Medium grained Granular
25G-1A, 0–11 79.0 79.1 1 G38 Not recovered   Drilling-induced
disaggregated
troctolite 		   
25G-1A, 11–20 79.1 79.2 2 G39 Not recovered   Troctolite Medium grained Granular

Previous   |    Close   |    Next   |    Top of page