Table T3. Summary of lithologic units and occurrences by section, Holes M0002A, M0003A, M0004A, M0004B, and M0004C.
| Unit |
General lithologies |
Depth (mbsf) |
Thickness (m) |
Age | Core, section, interval (cm) |
|---|---|---|---|---|---|
| 1 | Brown, olive, gray, and black silty clay, silty mud, and clayey silt, with intervals of color banding and isolated sand lenses. Isolated pebbles throughout. | 0.00–220.24 | 220.24 | Holocene to middle Eocene |
302-M0002A-1X-1, 0 cm, to 51X-1, 150 cm, (0–220.24 mbsf) 302-M0003A-1H-1, 0 cm, to H-CC, 5 cm (0–15 mbsf) 302-M0004A-1H-1, 0 cm, to 3X-2, 128 cm (17.0–28.28 mbsf) 302-M0004B-1X-1, 0 cm, to 1X-2, 85 cm (10.0–12.29 mbsf) 302-M0004B-3X-1, 0 cm, to 3X-CC, 25 cm (215.0–219.0 mbsf) 302-M0004C-1H-1, 0 cm, to 9X-CC, 25 cm (0–36.66 mbsf) |
| 1/1 | Brown silty clay, silty mud, and sandy mud, strong color banding, contains biogenic carbonate and isolated pebbles. | 0.00–5.29 | 5.28 | Holocene to late Pleistocene |
302-M0002A-1X-1, 0 cm, to 2X-1, 108 cm (0–2.58 mbsf) 302-M0003A-1H-1, 0 cm, to 1H-1, 110 cm (0–1.1 mbsf) 302-M0004C-1H-1, 0 cm, to 2H-1, 129 cm (0–5.29 mbsf) |
| 1/2 | Brown silty clay, contains minor amounts of biogenic carbonate, with intervals of color banding and isolated sand lenses, isolated pebbles throughout. | 2.58–23.59 | 21.01 | late Pleistocene |
302-M0002A-2X-1, 108 cm, to 5X-1, 88 cm (2.58–17.38 mbsf) 302-M0003A-1H-1, 110 cm, to 3H-CC, 15 cm (1.1–15.0 mbsf) 302-M0004A-1H-1, 0 cm, to 2X-1, 118 cm (17.0–21.68 mbsf) 302-M0004B-1X-1, 0 cm, to 1X-2, 85 cm (10.0–12.29 mbsf) 302-M0004C-2H-1, 129 cm, to 6X-1, 2 cm (5.29–23.59 mbsf) |
| 1/3 | Olive to olive-brown silty clay to silty mud, with color banding and occasional black microconcretions, sand lenses, and isolated pebbles occur throughout. | 17.38–168.53 | 151.15 | Pleistocene to middle Miocene |
302-M0002A-5X-1, 88 cm, to 38X-3, 45 cm (17.38–168.53 mbsf) 302-M0004A-2X-1, 118 cm, to 3X-2, 128 cm (21.38–28.28 mbsf) 302-M0004C-6X-1, 2 cm, to 9X-CC, 25 cm (23.59–36.66 mbsf) |
| 1/4 | Brown silty clay with intervals of color banding and black microconcretions, sand lenses, and isolated pebbles occur throughout. | 168.53–192.94 | 24.41 | middle Miocene | 302-M0002A-38X-3, 45 cm, to 44X-1, 95 cm (168.53–192.94 mbsf) |
| 1/5 | Firm silty clay, tilted gray to black "zebra-stripe" crosscutting couplets, occasional pyrite concretions, sand lenses, and isolated pebbles throughout. | 192.94–198.13 | 5.19 | middle Miocene (?) | 302-M0002A-44X-1, 95 cm, to 46X-1, 113 cm (192.94–198.13 mbsf) |
| 1/6 | Very dark gray, firm homogeneous silty clay to clayey silt with disseminated pyrite and minor amounts of siliceous microfossils; isolated pebbles throughout. | 198.13–220.24 | 22.11 | middle Miocene to middle Eocene |
302-M0002A-46X-1, 113 cm, to 51X-1, 150 cm, (198.13–220.24 mbsf) 302-M0004B-3X-1, 0 cm, to 3X-CC, 25 cm (215.0–219 mbsf) |
| 2 | Very dark gray, laminated, and cross-laminated mud-bearing biosiliceous ooze, with occasional isolated pebbles and pyrite lenses. | 220.24–318.96 | 98.72 | middle Eocene |
302-M0002A-51X-1, 150 cm, to 62X-CC, 11 cm (220.24–267.71 mbsf) 302-M0004A-4X-1, 0 cm, to 15X-1, 26 cm (265.0–313.61 mbsf) |
| 3 | Very dark gray very firm clay to silty clay with occasional laminations and pyrite concretions and minor amounts of siliceous microfossils and biogenic opal. | 318.96–404.75 | 85.97 | late Paleocene to early Eocene | 302-M0004A-15X-1, 26 cm, to 35X-CC, 18 cm (313.61–404.79 mbsf) |
| 4 | Very dark gray clayey mud, silty clay, and silty sand, with sandstone fragments and occasional pyrite concretions. | 424.51–427.63 | 3.12 | Late Cretaceous | 302-M0004A-41X-1, 0 cm, to 42X-CC, 17 cm (424.50–427.63 mbsf) |
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