Table T2. Summary of lithostratigraphic units identified at Site 1095.
Unit | Depth (mbsf) |
Thickness (m) | Age | Lithology and characteristic features |
---|---|---|---|---|
I |
0.0--49.3 |
49.3 |
Holocene to late Pliocene |
Biogenic-rich, massive, intensely bioturbated, dominantly brown silty clays with ice-rafted debris (IRD). Interbedded with laminated silts, silty clays, and siliceous oozes. Separated from underlying Unit II by transition zone of parallel-laminated and cross-laminated silts, silty clays, and diamict beds. |
II |
49.3--435.5 |
386.2 |
late Pliocene to late Miocene |
Dominantly repetitively bedded and diatom-bearing cross- and parallel-laminated sands, silts, and clays, gray-greenish. Frequency of sands and silts shows distinct cyclicity. These intervals are intensely bioturbated with enhanced IRD. As minor lithology, diatomaceous oozes are present. |
III |
435.5--570.2 |
134.7 |
late Miocene |
Repetitively bedded, parallel-laminated claystone and siltstone with minor bioturbation and decrease of IRD content. |