Unit/Subunit | Lithologies
with volcanic components |
Section | Feldspar | Glass (brown) |
Pumice | Lithics | Volcanic clay |
Tephra layer | Age (Ma) |
---|---|---|---|---|---|---|---|---|---|
IA
|
Foraminifer/diatom-bearing nannofossil ooze | 1R-CC |
|
|
|
|
|
|
1.9-0.6
|
|
2R-CC |
|
|
|
|
|
|
1.9-0.6
|
|
IB
|
Foraminifer-bearing nannofossil ooze | 3R-CC |
|
|
|
|
|
|
18.0-11.5
|
|
4R-CC |
|
R
|
|
|
|
|
18.0-11.5
|
|
5R-CC |
|
R
|
|
|
P
|
|
18.0-11.5
|
||
6R-CC |
|
R
|
|
|
|
|
18.0-11.5
|
||
7R-CC |
|
P
|
|
|
P
|
|
18.0-11.5
|
||
8R-CC |
|
A
|
|
|
|
|
18.0-11.5
|
||
9R-CC |
|
R
|
|
|
R
|
|
24.0-18.0
|
||
10R-CC |
P
|
R
|
|
|
P
|
|
24.0-18.0
|
||
11R-CC |
|
P
|
|
|
|
T
|
24.0-18.0
|
||
12R-CC |
P
|
|
|
|
|
|
24.0-18.0
|
||
13R-CC |
|
|
|
|
|
|
24.0-18.0
|
||
14R-CC |
P
|
C
|
|
|
|
|
24.0-18.0
|
||
II
|
Nannofossil-bearing clay and claystone, and nannofossil-bearing ooze and chalk | 15R-CC |
|
C
|
|
|
P
|
|
24.0-18.0
|
16R-CC |
|
A
|
|
|
|
|
24.0-18.0
|
||
17R-CC |
|
R
|
|
|
|
|
24.0-18.0
|
||
18R-CC |
|
|
|
|
|
|
24.0-18.0
|
||
19R-CC |
|
|
|
|
|
|
26.5-23.8
|
||
20R-CC |
P
|
|
|
R
|
|
|
26.5-23.8
|
||
21R-CC |
C
|
|
|
C
|
|
|
26.5-23.8
|
||
22R-CC |
|
|
|
|
|
|
31.0-26.5
|
||
23R-CC |
|
|
|
|
|
|
31.0-26.5
|
||
24R-CC |
|
|
|
P
|
P
|
|
31.0-26.5
|
||
25R-CC |
|
|
|
|
|
|
31.0-26.5
|
||
26R-CC |
C
|
R
|
|
P
|
|
|
31.0-26.5
|
||
34R-CC |
|
|
|
|
C
|
|
31.0-26.5
|
||
35R-CC |
|
|
|
|
C
|
|
31.0-26.5
|
||
36R-CC |
|
|
|
|
|
|
31.0-26.5
|
||
37R-CC |
|
|
|
|
|
|
31.0-26.5
|
||
38R-CC |
|
|
|
|
|
TT
|
31.0-26.5
|
||
39R-CC |
P
|
|
|
|
P
|
|
31.0-26.5
|
Notes: Age from biostratigraphy. Volcanic components in >63-µm fraction of core catcher sample are represented by A = abundant, C = common, P = present, and R = rare. Volcanic components not abundant in Sections 183-1139A-27R-CC through 33R-CC and beyond 39R-CC in Unit II. T = discrete tephra are present in the core from which the core catcher was examined, TT = two tephra layers. Blanks = volcanic component not detected. Gray bar = Sections 183-1139A-27R-CC through 33R-CC contain no data.