| Unit | Core,
section, piece, interval (cm) |
Type of basalt | Phenocrysts (%) | Groundmass
mineralogy (%) |
Groundmass texture |
Alteration | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plag | Ol | Plag | Cpx | Ol | Opq | Ms | ||||||
| 183-1141A- | ||||||||||||
| 2 | 16R-2, 5-8 | Sparsely plagioclase phyric | 1 | 50 | 30 | 2 | 18 | Intersertal to intergranular | Moderate | |||
| 3 | 16R-CC (Piece 3B, 37-38) | Aphyric basalt | <1 | 50 | 30 | 2 | 18 | Intersertal to intergranular | Moderate | |||
| 17R-1 (Piece 6, 26-29) | Sparsely plagioclase phyric | 2 | 65 | 15 | 3 | 15 | Intersertal to intergranular | High | ||||
| 4 | 17R-CC (Piece 1, 24-27) | Sparsely plagioclase phyric | 2 | 50 | 30 | 3 | 15 | Intersertal to intergranular | High | |||
| 18R-1 (Piece 18, 146-148) | Sparsely plagioclase phyric | 2 | 50 | 30 | 10 | 5 | 5 | Intersertal to intergranular | Moderate | |||
| 19R-2 (Piece 2, 13-14) | Moderately olivine phyric | <1 | 5 | 45 | 35 | 3 | 10 | Intersertal to intergranular | High | |||
| 5 | 21R-2 (Piece 1D, 126-128) | Sparsely olivine phyric | 2 | 50 | 40 | Ophitic to intersertal | Moderate | |||||
| 21R-3 (Piece 1C, 93-95) | Vesicular olivine phyric | <1 | 2 | 40 | 40 | 3 | 10 | Intersertal to intergranular | High | |||
| 6 | 22R-2 (Piece 3A, 79-81) | Vesicular olivine phyric | 3 | 60 | 10 | 3 | 20 | Trachytic | Very high | |||
| 22R-3 (Piece 7, 100-101) | Sparsely olivine phyric | <1 | 2 | 40 | 30 | 10 | 3 | 15 | Subophitic | High | ||
| 22R-3 (Piece 12, 146-148) | Sparsely olivine phyric | 2 | 40 | 30 | 10 | 3 | 15 | Subophitic to intergranular | High | |||
| 23R-1 (Piece 2B, 46-49) | Moderately olivine phyric | 3 | 45 | 25 | 10 | 3 | 12 | Subophitic to intergranular | High | |||
| 23R-1 (Piece 1C, 106-109) | Sparsely olivine phyric | 2 | 40 | 30 | 10 | 3 | 15 | Subophitic | High | |||
| 23R-2 (Piece 5C, 61-63) | Moderately olivine phyric | 4 | 50 | 40 | 5 | 2 | Subophitic | Slight | ||||
| 23R-2 (Piece 11A, 107-108) | Sparsely olivine phyric | <1 | 2 | 40 | 40 | 10 | 3 | 5 | Ophitic | Slight | ||
| 24R-1 (Piece 1A, 6-8) | Moderately olivine phyric | 3 | 50 | 30 | 1 | 4 | 10 | Intersertal to intergranular | Slight | |||
| 24R-2 (Piece 2A, 36-37) | Sparsely olivine phyric | <1 | 2 | 50 | 30 | 3 | 15 | Intersertal to intergranular | Moderate | |||
| 183-1142A- | ||||||||||||
| 1 | 2R-1 (Piece 9, 50-53) | Sparsely olivine phyric | <1 | 2 | 40 | 50 | 3 | 5 | Intergranular | Slight | ||
| 3 | 6R-1 (Piece 3, 11-14) | Moderately plagioclase phyric | 3 | <1 | 45 | 45 | 4 | 5 | Intergranular | Moderate | ||
| 6 | 9R-3 (Piece 9, 108-111) | Aphyric basalt | 50 | 45 | 5 | 5 | Trachytic, aphanitic | Moderate | ||||
| 9R-4 (Piece 1, 3-7) | Glassy pillow margin | 2 | 0 | 45 | 25 | 5 | 25 | Trachytic, glassy | Very high | |||
| 10R-1 (Piece 5B, 37-40) | Aphyric basalt | 60 | 20 | 4 | 15 | Intergranular | High | |||||
Note: Plag = plagioclase, Cpx = clinopyroxene, Ol = olivine, Opq = opaque, Ms = mesostasis.