Lithologic
unit/subunit |
Basement
unit |
Core
interval |
Depth
(mbsf) |
Thickness
(m) |
Age |
Lithology |
Interpretation |
I |
|
1R-1,
0 cm, to 12R-CC, 28 cm |
0.00-112.00 |
112.00 |
late
Pleistocene to late Miocene |
Gray
foraminifer-bearing diatom clay and ooze with scattered ice-rafted pebbles |
Continuous
pelagic with intermittent sediment gravity flows of terrigenous sediment;
bathyal |
IIA |
|
13R-1,
0 cm, to 16R-CC, 18 cm |
112.00-150.50 |
38.50 |
late
Miocene |
Light
gray foraminifer-bearing nannofossil clay |
Continuous
pelagic with intermittent sediment gravity flows of terrigenous sediment;
bathyal |
IIB |
|
17R-1,
0 cm, to 28R-CC, 10 cm |
150.50-265.90 |
115.40 |
late
to early Miocene |
White
foraminifer-bearing nannofossil ooze |
Pelagically
deposited sediment; bathyal environment |
IIIA |
|
29R-1,
0 cm, to 52R-CC, 26 cm |
265.90-496.40 |
230.50 |
late
Oligocene to late Maastrichtian |
White
foraminifer-bearing nannofossil chalk |
Pelagically
deposited sediment; bathyal environment |
IIIB |
|
53R-1,
0 cm, to 63R-CC, 18 cm |
496.40-601.80 |
105.40 |
late
Maastrichtian to middle Campanian |
White
foraminifer-bearing chalk |
Pelagically
deposited sediment; bathyal environment |
IV |
|
64R-1,
0 cm, to 69R-5, 112 cm |
601.80-656.69 |
54.89 |
mid-Campanian
to Turonian |
Interbedded
light gray chalk and dark gray nannofossil claystone; black, organic-rich
claystone |
Pelagically
deposited sediment; bathyal environment |
V |
|
69R-5,
112 cm, to 71R-2, 138 cm |
656.69-671.88 |
15.19 |
Santonian-Turonian |
Reddish
brown glauconite-bearing calcareous sandstone and glauconitic sandy
claystone |
Neritic
(shallow marine) deposit |
VI |
|
71R-2,
138 cm, to 74R-1, 13 cm |
671.88-698.23 |
26.35 |
Late
Cretaceous |
Dark
brown silty clay with interbedded sandstone and conglomerate |
Fluvial
and possibly neritic (shallow marine) |
VII |
1-22 |
74R-1,
13 cm, to 89R-3, 73 cm |
698.23-842.70 |
144.47 |
Cretaceous(?) |
Basalt
flows capped by volcaniclastic rocks and minor sediments |
Volcanic
lava flows and pyroclastics |