. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography SAND STORAGE IN THE SHOREFACE 281 1970) the evidence has frequently been destroyed by landward migration of the barriers. However, it is pos- sible, in the time-honored deductive fashion of coastal morphologists, to consider the conditions most favorable to these two modes of barrier formation. Spits are cer- tainly characteristic of coasts ofhigh relief undergoing rapid transgression as described above [see the papers in Schwartz (1973)]. It seems
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography SAND STORAGE IN THE SHOREFACE 281 1970) the evidence has frequently been destroyed by landward migration of the barriers. However, it is pos- sible, in the time-honored deductive fashion of coastal morphologists, to consider the conditions most favorable to these two modes of barrier formation. Spits are cer- tainly characteristic of coasts ofhigh relief undergoing rapid transgression as described above [see the papers in Schwartz (1973)]. It seems probable that under such conditions mainly beach detachment would be severely inhibited. Even allowing for ideal initial conditions with a classic coast of old age (Fig. 21), where alluvial fans are flush with truncated headlands, detached mainland beaches would have a limited capability for survival. With significant relief, the submarine valley floors ad- jacent to retreating headlands must lie in increasingly deeper water after the onset of transgression. As the barrier grows into the bay, its submarine surface area must increase, and the capacity of littoral drift to nourish it may eventually be exceeded. As this point is approached, the combination of storm washover and shoreface erosion will cause the barrier to retreat until equilibrium is restored, a position which may be well inland from the tips of headlands. Both littoral wave power and sediment supply may be deficient in these inland positions, further jeopardizing the survival of A. STILLSTAND. B. BEACH DETACHMENT. 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; United States. Environmental Science Services Administration. Research Laboratories; Environme
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