Table T3. Summary of stratigraphic relations at Site 1176 and correlation with Site 1175.
| Unit | Facies name |
Interval (cm) | Depth (mbsf) |
Thickness (m) | Stratigraphic age | Lithologic description |
Processes
of formation |
Correlation with Site 1175 | |
|---|---|---|---|---|---|---|---|---|---|
|
Top
|
Bottom
|
||||||||
| I | Upper slope basin | 1176A-1H-1, 0 | 1176A-22X-4, 139 | 000.00-195.79 | 195.79 | Quaternary | Hemipelagic (nannofossil-rich) mud, volcanic ash, sand-to-silt turbidites, local soft-sediment folding and chaotic disruption | Hemipelagic settling, volcanic ash falls, turbidity currents, rare submarine slumps | Unit I |
| II | Middle slope basin | 1176A-22X-4, 139 | 1176A-25X-4, 34 | 195.79-223.54 | 27.75 | Quaternary | Hemipelagic mud, sandy mudstone, rare volcanic ash | Hemipelagic settling, muddy debris flows, volcanic ash falls | Unit II |
| III | Slope to prism transition | 1176A-25X-4, 34 | 1176A-48X-CC, 36 | 223.54-440.36 | 216.82 | Quaternary to Pliocene | Hemipelagic mudstone, pebbly mudstone, gravel, abundant sand-to-silt turbidites, rare volcanic ash | Debris flows, frequent turbidity currents, hemipelagic settling, volcanic ash falls | Unit III |