Figure F10. Isopach map of the Ubasement interval showing two-way traveltime between the U reflection and basement, based on MCS profiles of the SCREECH survey (Ewing cruise 00-07) along transect 2. Locations of Sites 1276 and 1277 are indicated. Note that the deposits below the U reflection fill depressions between basement ridges. Interpretation of an Ubasement interval southeast of Site 1277 is tentative; the U reflection cannot be traced continuously to this location from farther west in existing seismic data, and the possible U reflection there is inferred only on the basis of reflection character and depth (see, e.g., Fig. F9 for one example of possible occurrence of U in this zone).
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