139 HAG, B. U., HARDENBOL, J., and VAIL, P. R. 1987. "Chronology of 

 Fluctuating Sea-Levels Since the Triassic," Science . Vol 235, pp 1156-1167. 



Advances in sequence stratigraphy and the development of depositional 

 models have helped explain the origin of genetically related sedimentary 

 packages during sea- level cycles. These concepts have provided the basis for 

 the recognition of sea- level events in subsurface data and in outcrops of 

 marine sediments around the world. Knowledge of these events has led to a new 

 generation of Mesozoic and Cenozoic global cycle charts that chronicle the 

 history of sea- level fluctuations during the past 250 million years in greater 

 detail than was possible from seismic-stratigraphic data alone. An effort has 

 been made to develop a realistic and accurate time scale and widely applicable 

 chronostratigraphy and to integrate depositional sequences documented in 

 public domain outcrop sections from various basins with this chronstrati- 

 graphic framework. A description of this approach and an account of the 

 results, illustrated by sea- level cycle charts of the Cenozoic, Cretaceous, 

 Jurassic, and Triassic intervals, are presented. (Authors). 



140 HAQ, B. U., HARDENBOL, J., and VAIL, P. R. 1988. "Mesozoic and 

 Cenozoic Chronostratigraphy and Cycles of Sea-Level Change," Wilgus, C. K. , 

 Hastings, B. S., Kendall, C. G., Posamentier, H. W. , Ross, C. A., and Van 

 Wagoner, J. C, eds . , Sea-Level Changes: An Integrated Approach . Special 

 Publication No. 42, Society of Economic Paleontologists and Mineralogists, 

 Tulsa, OK, pp 71-108. 



Sequence-stratigraphic concepts are used to identify genetically related 

 strata and their bounding regional unconformities, or their correlative 

 conformities, in seismic, well-log, and outcrop data. Documentation and age 

 dating of these features in marine outcrops in different parts of the world 

 have led to a new generation of Mesozoic and Cenozoic sea- level cycle charts 

 with greater event resolution than that obtainable from seismic data alone. 

 The cycles of sea- level change, interpreted as having been found in response 

 to sea- level fluctuations, can be tied into the chronostratigraphy. 



Four cycle charts summarizing the chronostratigraphy, coastal-onlap 

 patterns, and sea- level curves for the Cenozoic, Cretaceous, Jurassic, and 

 Triassic are presented. A large-scale composite-cycle chart for the Mesozoic 

 and Cenozoic is also included (in pocket). The relative magnitudes of sea- 

 level falls, interpreted from sequence boundaries, are classified as major, 

 medium, and minor, as are the condensed sections associated with the intervals 

 of sediment starvation on the shelf and slope during the phase maximum shelf 

 flooding during each cycle. Generally only the sequence boundaries produced 

 by major and some medium-scale sea-level falls can be recognized at the level 

 of seismic stratigraphic resolution; detailed well-log and/or outcrop studies 

 are usually necessary to resolve the minor sequences. (Authors). 



141 HARRIS, D. L. 1981. Tides and Tidal Datums in the United States . U.S. 

 Army Corps of Engineers, CERC (Coastal Engineering Research Center), Special 

 Report No. 7, pp 382. 



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