The North Atlantic Cycle: An Overview Of 2Nd-Order Transgressive/Regressive Facies Cycles in the Lower Cretaceous of Western Europe
Published:January 01, 1999
Thierry Jacquin, Giovanni Rusciadelli, Francis Amedro, Pierre-Charles de Graciansky, Françoise Magniez-Jannin, 1999. "The North Atlantic Cycle: An Overview Of 2Nd-Order Transgressive/Regressive Facies Cycles in the Lower Cretaceous of Western Europe", Mesozoic and Cenozoic Sequence Stratigraphy of European Basins, Pierre-Charles de Graciansky, Jan Hardenbol, Thierry Jacquin, Peter R. Vail
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Up to six 2nd-order transgressive/regressive facies cycles have been identified within the overall Lower Cretaceous transgressive phase. They are defined on the basis of a widespread set of data ranging from the northern North Sea to southern Italy. They are long-term duration (3 to 14 my) cycles, made of higher order depositional sequences which have been described in both carbonate and siliciclastic settings and mainly from the London-Paris basin to southern Italy. The large-scale stratal pattern of these cycles document the relationship of the type and amount of sediment supply to changes in the rate of accommodation. The Pre-Aptian cycles which are mostly aggradational, relate to high-rates of sediment supply together with changing rates of accommodation. They are limited by major erosional unconformities to which forestepping sequences that include major lowstand deposits, are merging. The Aptian and post-Aptian cycles are mostly retrogradational; these lead to the widespread development of organic-rich condensed horizons at peak transgressions in basinal settings. The unconformities bounding these cycles are also highly erosional and relate to major intraplate reorganization of the strain field in connection with the North Atlantic rifting.
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Mesozoic and Cenozoic Sequence Stratigraphy of European Basins
Mesozoic and Cenozoic Sequence Stratrigraphy of European Basins - This project was designed to build a documented chronostratigraphic and outcrop record of depositional sequences calibrated across European Basins. Data on standard stages, magnetostratigraphy, and geochronology integrated with high resolution biostratigraphy calibrate the stratigraphic position of depositional sequence boundaries. Higher order eustatic sequences show a significant increase in the number identified. A good portion of the European Mesozoic and Cenozoic succession is set in a sequence stratigraphic context with a better stratigraphic record of its bonding surfaces.