Figure 4.7. Shaded-relief bathymetry, colored by water depth, of the depression south of Deer Island where the deepest water in Boston Harbor occurs (about 28 m deep).  See Figure 4.2 for map location. Red dots show location of bottom photographs (see Appendix 3 to view all photographs at these locations); yellow dot is location of bottom sediment sample (Appendix 2); number is station identifier.

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