Figure 18

Pseudo-colored map of the sea floor off Truro showing combined bathymetry and backscatter intensity. Map shows a sand wave field, the general offshore trend toward higher backscatter and coarser sediments with this part of the study area, the gravelly area which probably consists of winnowed topset beds of the delta that built the Wellfleet outwash plain, and the location of station CC91. Inset shows map location (blue polygon) within survey area (red polygon).