the same depth the mottling of the abrasion platform by karstic dissolution, 

 probably occurred during the last glacial regression. A comparison with sub- 

 merged sea- levels of the same range studied in other parts of the Sardinian 

 continental shelf confirms that the stillstand time during the Holocene 



transgression was particularly long. During this stillstand climatic condi- 

 tions have favored the formation of beach rock. (Authors) . 



350 UPCHUPI, E., and AUBREY, D. G. 1988. "Suspect Terranes in the North 

 American Margins and Relative Sea-Levels," Journal of Geology . Vol 96, 

 pp 79-90. 



Sea- level trends deduced from tide gages show considerable variation 

 along strike both on the convergent (western) and divergent (eastern) edges of 

 the North American plate. That portion of the variation unrelated to 

 Quaternary glaciation and deglaciation may reflect the differential reaction 

 to extension and sediment loading in the east, and in the west subduction and 

 translation of terranes welded onto the North American craton. These 

 autonomous blocks appear to impart distinct signatures on records of relative 

 sea- levels, suggesting promise in deducing complex terrane topography of other 

 margins using tide-guage data. Uncertainties in these deduction can be 

 reduced only with expanded tide gage coverage or by application of new 

 geodetic techniques (Very Long Baseline Interferometry or differential Global 

 Positioning System) . 



351 UUSITALO, S. 1960. "The Numerical Calculation of Wind Effect on Sea- 

 Level Elevations," Tellus . Vol XII, No. 4, pp 427-435. 



An iteration method has been developed which uses finite differences for 

 calculating water level elevation and water transport. To this end, the equa- 

 tions of motion were integrated over the depth and transformed into an im- 

 plicit difference equation system. The equations were solved by the aid of an 

 electronic computer. Two main cases were calculated, and in one instance the 

 water levels were checked with the real ones. (Author). 



352 VAIL, P. R. 1980. "Global Cycles of Sea-Level Change and Their Role in 

 Exploration," Proceedings of the World Petroleum Congress V.2: Exploration 

 Supply and Demand. Bucharest. Rom.. Sep. 9-14. 1979 . Heyde , and Son, 

 Philadelphia, PA, pp 95-104. 



This study discusses global cycles of sea- level change, a summary of 

 procedures for seismic stratigraphic analysis using global cycles, and four 

 major applications of sea-level cycles in petroleum exploration. (Compendix 

 citation) . 



162 



