| Lithologic unit/subunit | Basement units | Core interval | Depth (mbsf) | Thickness (m) | Age | Lithology | Interpretation |
|---|---|---|---|---|---|---|---|
|
IA
|
1R-1, 0 cm, to 2R-CC, 19 cm | 0.00-19.00 | 19.00 | middle to early Pleistocene | Foraminifer-bearing diatom-bearing nannofossil ooze | Pelagically deposited sediment; bathyal environment (cold water) | |
|
IB
|
3R-1, 0 cm, to 5R-CC, 25 cm | 19.00-47.50 | 28.50 | middle Miocene | Foraminifer-bearing nannofossil ooze | Pelagically deposited sediment; bathyal environment | |
|
II
|
6R-1, 0 cm, to 40R-5, 92 cm | 47.50-380.72 | 333.22 | middle Miocene to late Oligocene | Gray nannofossil-bearing clay and claystone and nannofossil-bearing ooze and chalk | Continuous pelagic with influx of terrigenous sediment-bathyal environment | |
|
III
|
40R-5, 92 cm, to 40R-CC, 20 cm | 380.72-383.50 | 2.78 | late Oligocene to late Eocene | Brownish gray to pink foraminifer nannofossil chalk | Pelagically deposited sediment; bathyal environment | |
|
IV
|
41R-1, 0 cm, to 41R-2, 40 cm | 383.50-384.87 | 1.37 | late Eocene or older | Sandy packstone | Low energy neritic environment | |
|
V
|
41R-2, 40 cm, to 49R-1, 110 cm | 384.87-461.70 | 76.83 | late Eocene or older | Cross-bedded grainstone with minor interbedded rudstone and packstone | High energy neritic carbonate shoal | |
|
VI
|
1-19
|
49R-1, 110 cm, to 73R-3, 148 cm | 461.7-694.2 | 232.5 | late Eocene or older | Altered volcaniclastic and felsic volcanic rocks and basalt flows | Evolving subaerial volcanism followed by hydrothermal alteration |