events suggest that the indirectly dated marine chronology may need revision 

 and that orbital forcing may not be the principal cause of the Pleistocene ice 

 ages. (Modified Abstract). 



368 WORSLEY. T. R. . and DAVIES, T. A. 1979. "Sea-Level Fluctuations and 

 Deep-Sea Sedimentation Rates," Science . Vol 203, No. 4379, pp 455-456. 



Sediment accumulation rate curves from 95 drilled cores from the Pacific 

 basin and sea-level curves derived from continental margin seismic strati- 

 graphy show that high biogenous sediment accumulation rates correspond to low 

 eustatic sea- levels producing lower land/sea ratios and hence slower chemical 

 erosion of the continents, and vice versa. (Authors). 



369 WORSLEY. T. R. , NANCE. D., and MOODY, J. B. 1984. "Global Tectonics 

 and Eustasy for the Fast 2 Billion Years," Marine Geology . Vol 58, pp 373-400. 



Continental freeboard and eustasy, as gaged by the relative position of 

 the world shelf break with respect to sea- level, have varied by +250 m from 

 today's ice -free shelf break depth of about 200 m, during the past 600 Ma. 



Assuming constant or uniformly accreting continental crust and ocean 

 water volume on an ice -free world, sea- level fluctuations can be attributed to 

 variation in the world ocean basin volume caused by changes in either its area 

 or its depth relative to the world shelf break. An increase in volume and 

 lowering of sea-level occur as: (1) the world ocean door ages, cools and 

 subsides; (2) accreting continents collide, thicken and decrease in sea; and 

 (3) poorly conductive continental platforms become thermally elevated due to a 

 size-induced stasis over the mantle. Conversely, a decrease in the age of the 

 world ocean floor, attenuation of continental crust during rifting, and an 

 increase in continent number and mobility, will reduce the world ocean basin 

 volume and raise sea- level. 



Theoretical sea-level calculated from these principles correlates well 

 with calibrated, first-order cycles of eustatic sea-level change for the 

 Phanerozoic. The record closely fits a simple model of retardation and accel- 

 eration of terrestrial heat loss during alternating periods of supercontinent 

 accretion and fragmentation. Calibrated to sea- level highstands, successive 

 first-order marine transgressions and erogenic "Pangea" regressions character- 

 ize it self-sustaining, about 440 Ma plate tectonic cycle for the late 

 Precambrian and Phanerozoic. The cycle can be recognized as far back as 2 Ga 

 from the tectonic evidence of continental collision and rifting recorded in 

 global erogenic peaks and mafic dike swarms, and may be related to major 

 episodes of glaciation and evolutional biogenesis. (Authors). 



370 WYRTKI. K. 1972. "Sea-Level During the 1972 El Nino," Journal of 

 Physical Oceanography . Vol 7, pp 779-787. 



Sea- level records at many island and coastal stations in the equatorial 

 Pacific Ocean have been used to study its response and that of the associated 



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