Sequences and Systems Tracts of Mixed Carbonate-Siliciclastic Platform-Basin Settings: The Cenomanian-Turonian Stages of Provence (Southeastern France)
Published:January 01, 1999
Jean Philip, 1999. "Sequences and Systems Tracts of Mixed Carbonate-Siliciclastic Platform-Basin Settings: The Cenomanian-Turonian Stages of Provence (Southeastern France)", Mesozoic and Cenozoic Sequence Stratigraphy of European Basins, Pierre-Charles de Graciansky, Jan Hardenbol, Thierry Jacquin, Peter R. Vail
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The application of the sequence stratigraphy concepts to mixed carbonate-siliciclastic platforms and adjacent basins is of great interest in reconstructing the paleogeographic evolution of pericratonic domains. The Cenomanian-Turonian stages of Provence are well adapted to this application because the connection between the platform and the basin is preserved, thus leading to accurate facies and lithostratigraphic correlations. Moreover, both the paleogeographic setting of carbonate platforms and the source of siliciclastics can be determined. Biostratigraphic data based on ammonites, rudists, planktonic and benthic foraminifers, allows high resolution chronostratigraphic dating and correlation from the basin to the platform. Two detailed sections have been described as typical of the regional stratigraphical series: one for the basinal area, another for the carbonate platform. Sedimentology, biostratigraphy and sequence stratigraphy, lead to distinguish five third order sequences and their correlative systems tracts encompassing the Early Cenomanian-Middle Turonian time.
Distribution of facies and evolution of paleoenvironments are analysed with respect to relative sea-level changes. The amplitude of sea-level changes at the 3rd-order scale has been estimated by the method by Vail et al. (1977).
Sequence boundaries are of several types: tectonically enhanced, or controlled by eustasy. Two tectonically induced 2nd order regressive-transgressive cycles have been identified. The second one, from Middle Cenomanian to Middle Turonian time displays a succession of phases (forestepping, aggrading, backstepping) that compare well to those described by Jacquin et al. (1992) for the Middle Jurassic Paris Basin.
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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.