Figure F7. A. Uninterpreted multichannel seismic (MCS) dip Profile EW00-01-66 from the southern part of the survey grid showing the locations of Sites U1351, U1353, and U1354 (proposed Sites CB-03B, CB-01A, and CB-02A). Red = actual penetrations, yellow = proposed penetrations. Proposed alternate Sites CB-01B, CB-02B, and CB-03A (yellow) are also shown (see Fig. F3 for location). B. Interpretation showing sequence boundaries and selected locations of onlap, truncation, and downlap (arrows). Circles = clinoform rollovers, or breaks, representing paleoshelf edges. Paleoshelf edges from sequence boundaries U4–U8 prograde steadily. The amount of progradation decreases from U8–U12, increasing again from U13–U19. Sequence boundaries U4–U8 are onlapped and truncate underlying reflections; internal reflection geometries from U4–U9 are mainly sigmoid. In contrast, U10–U19 are downlapped on paleoshelves but also truncate underlying reflections, and internal reflection geometries from U9 to the seafloor are oblique. Site U1351 (proposed Site CB-03B) sampled the paleoslopes of U6–U7 and sampled U8–U19 landward of their paleoshelf edges. Sites U1353 and U1354 sampled U5–U18 landward of their paleoshelf edges in a more proximal setting. Sediment drift development in this area largely ceased by U4. Only drift D5 is present; it is capped by a postdrift slope platform at U4. Prograding clinoforms dominate later sequences and the slope steepens (to 3–5?). Drifts migrate northwestward (landward) on dip profiles. Erosional unconformities at the landward edges of drift moats are diachronous and intersected by multiple sequence boundaries.
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