063 DALY, R. A. 1920. "Oscillations of Level in the Belts Peripheral to 

 the Pleistocene Ice-Caps," American Association of Petroleum Geologists . 

 Bulletin 31, pp 303-318. 



Many lines of evidence seem to support Jamieson's suggestion that the 

 earth's crust has been plastically deformed by glacial loading and in the 

 reverse way, by unloading through the melting of icecaps. Study of the 

 recently emerged zone in New England and of the specific distribution of 

 plants and animals in Newfoundland indicate the probable existence of a late 

 Glacial to Recent bulge of land near the edge of the continental shelf. If 

 that bulge ("Georges Bank Land") were flattened because the glaciated area on 

 the northwest rose in consequence of unloading (ice-melting), one may 

 reasonably expect field evidences of similar peripheral subsidence west of New 

 England. Deformed lake stands, the submarine channel of the Hudson River, the 

 "deeps" of the Susquehanna River, and Pleistocene drainage rearrangements of 

 the marginal belt west of New Jersey offer relevant topics for discussion. In 

 no case can the evidence be regarded as final, for none can be discussed 

 intelligently without making at least one unproved assumption. A leading and 

 general difficulty lies in the uncertainty as to the position of the zero 

 isobase corresponding to each subsidence and each uplift, respectively induced 

 by glaciation and deglaciation. Jamieson's hypothesis thus leads to many 

 questions without answers; precisely for that reason it has value if it 

 stimulates further fieldwork by experts. Especially because of Munthe ' s 

 positive results in Baltic lands, the hypothesis can not fail to be seriously 

 and actively entertained in America. (Author). 



064 DEAN, R. G. 1983. "Shoreline Erosion Due to Extreme Storms and Sea- 

 Level Rise," Final Report R/T-24, Coastal and Oceanographic Engineering 

 Department, Univ. of Florida, Gainesville, FL, pp 58. 



A summary is presented of research conducted on beach erosion associated 

 with extreme storms and sea- level rise. These results were developed by the 

 author and graduate students under sponsorship of the University of Delaware 

 Sea Grant Program. 



Various shoreline response problems of engineering interest are 

 examined. The basis for the approach is a monotonic equilibrium profile of 

 the form h = Ax-'^ in which h is water depth at a distance x from the 

 shoreline and A is a scale parameter depending primarily on sediment 

 characteristics and secondarily on wave characteristics. This form is shown 

 to be consistent with uniform wave energy dissipation per unit volume. The 

 dependency of A on sediment size is quantified through laboratory and field 

 data. Quasi-static beach response is examined to represent the effect of sea- 

 level rise. Cases considered include natural and sea-walled profiles. 



To represent response to storms of realistic durations, a model is 

 proposed in which the offshore transport is proportional to the "excess" 

 energy dissipation per unit volume. The single rate constant in this model 

 was evaluated based on large scale wave tank tests and confirmed with 

 Hurricane Eloise pre- and post-storm surveys. It is shown that most 

 hurricanes only cause 10% to 25% of the erosion potential associated with the 

 peak storm tide and wave conditions. Additional applications include profile 

 response employing a fairly realistic breaking model in which longshore bars 



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