. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography New York-New Jersey shelf 77 finer than landward flanks. Off Brigantine Inlet and off the New Jersey coast, shore- face-eonnected ridges are associated with free-standing inner shelf ridges that can be traced seaward for tens of kilometers in ap- parent genetic sequence. The ridges form on the shoreface in response to south-trend- ing coastal storm currents (Duane et al. 1972) and become detached from the shore- face as it retreats. They tend to mig
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography New York-New Jersey shelf 77 finer than landward flanks. Off Brigantine Inlet and off the New Jersey coast, shore- face-eonnected ridges are associated with free-standing inner shelf ridges that can be traced seaward for tens of kilometers in ap- parent genetic sequence. The ridges form on the shoreface in response to south-trend- ing coastal storm currents (Duane et al. 1972) and become detached from the shore- face as it retreats. They tend to migrate downcoast (to the south or west) and off- shore, extending their crestlines so as to maintain contact with the shoreline (Fig. 8). Eventually, however, contact is broken, and they are stranded on the deepening shelf floor. Downcoast ridge migration is part of a general pattern of southwesterly sand transport on the Atlantic shelf. In the offshore ridge topography, this pattern is indicated by the tendency of both ridge crests and trough talwegs to rise toward the southwest. Locally, it is indicated by patterns of erosion and deposition near wrecks (Fig. 9). Sand transport on the inner shelf The preceding description of the mor- phologic evolution of the New York shelf surface is based primarily on the interpre- tation of bathymetric maps, aided by local substrate inventories in which the bottom is 39°29'N 39°28N. 74°I6'W 74°I5'W 74°I4' Fig. 8. Patterns of erosion and deposition on Beach Haven Ridge, New Jersey, between 1935 and 1954, superimposed on 1954 bathymetry. Pat- tern of north flank erosion and south flank deposi- tion indicates downcoast migration of ridge. (From DeAlteris et al. in press.) examined by grab sampling, photography, Vibracoring, and seismic profiling. The con- clusions are qualitative but nonetheless valid. However, fuller understanding of the behavior of the shelf surface requires a different approach. We must directly measure fluid and sedi- m
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