. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Fig. 9. Tide-maintained ridge topography on the inner Anglian Shelf. Shoreface-connected ridges separate ebb- and flood- dominated channels. Ridges tend to migrate southward with time, and to detach from retreating shoreface. Ridges are nourished at the expense of shoreface, hence constitute cases of down-drift bypassing. Offshore ridges are probably being nourished at expense of nearshore ridges: if so, sand is moving seaward more rapidly than are
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Fig. 9. Tide-maintained ridge topography on the inner Anglian Shelf. Shoreface-connected ridges separate ebb- and flood- dominated channels. Ridges tend to migrate southward with time, and to detach from retreating shoreface. Ridges are nourished at the expense of shoreface, hence constitute cases of down-drift bypassing. Offshore ridges are probably being nourished at expense of nearshore ridges: if so, sand is moving seaward more rapidly than are the ridge forms, and dynamic bypassing is occurring also. From Robinson, 1966. dynamic bypassing as occurs in these estuaries is not sufficient to prevent the erosional retreat of the adjacent coasts, including the Dutch coast down- drift of the Rhine Delta (Van Straaten, 1965). The formation of the surficial sand sheet by tidal erosion of the shoreface and reconstitution of its materials under the tidal hydraulic regime are analyzed by Belderson and Stride (1966). Tide-induced erosional retreat of the Anglian coast is accomplished by the growth, migration, and detachment of shoreface- connected ridges similar in some respects to those of the Middle Atlantic Bight. However, they are main- tained not primarily by storm flow but by residual tidal discharge that has a flood value on the inner flank and an ebb value on the outer flank (Fig. 9; Robinson, 1966). Storage and periodic detachment of these shoreface sand masses appears to have created a shoal retreat massif of tide-maintained sand ridges that extends for 200 km out into the North Sea (Fig. 10; Caston, 1972). u. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atlantic Oceanographic and Meteorological Laboratories; Pacific Oceanographic Laboratories; Un
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