Table T4. Lithologic surfaces and their interpretation, Site U1351. (See table note.)
|
Lithologic surface |
Hole, core, section, interval (cm) |
Depth CSF-A (m) |
Overlying lithology | Nature of significant surface |
Seismic sequence boundary |
Predicted depth (m) |
Preliminary biostratigraphy (Ma) |
|---|---|---|---|---|---|---|---|
| 317- | |||||||
| U1351A-S1 | U1351A-3H-3, 74 | 15.93 | Shelly | Sharp basal contact | U19 | 17 | <0.29 (CN); possibly <0.1 (CN) |
| U1351B-S1 | U1351B-2H-6, 68 | 15.98 | Shelly | Sharp basal contact | |||
| U1351A-S2 | U1351A-6H-1, 26 | 27.76 | Shelly sand | Sharp basal contact | U18 | 31 | <0.29 (CN); possibly <0.1 (CN) |
| U1351B-S2 | U1351B-5H-3, 3 | 31.00 | Sand | Sharp basal contact | |||
| U1351B-S3 | U1351B-8H-4, 5 | 52.25 | Muddy gravely sand | Sharp basal contact; burrows beneath | U17 | 51 | 0.29 (CN)–0.44 (CN) |
| U1351B-S4 | U1351B-10H-2, 45 | 67.27 | Sandy shelly mud | Gradational contact separating sandy, shelly muds above from shelly sands beneath; possible cave-in | U16 | 64 | 0.44 (CN)–1.01 (CN) |
| U1351B-S5 | U1351B-12H-1, 122 | 76.92 | Muddy, shelly sand | Burrowed; incomplete recovery | U15 | 86 | 1.34–1.69 (CN) |
| U1351B-S6 | U1351B-19X-2, 104 | 144.14 | Shelly sand | Sharp basal contact | U13 | 135 | Pleistocene/Pliocene boundary sediments above 1.69–1.81; below ?>2.7 (PF) |
| U1351B-S7 | U1351B-22X-1, 102 | 171.42 | Shelly sandy mud | Sharp basal contact; burrowed clays beneath | U12 | 166 | ?>2.7 (PF) |
| U1351B-S8 | U1351B-30X-5, 80 | 253.90 | Shelly sand | Well-preserved shells and fragments in a muddy sand matrix; sharp burrowed contact | U10 | 237 | 3.7 (CN)–4.3 (PF) |
Note: CN = calcareous nannofossil, PF = planktonic foraminifer.
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