Mid-cretaceous sequence stratigraphy and sedimentary cyclicity in the western Paris Basin
Identifieur interne : 001526 ( France/Analysis ); précédent : 001525; suivant : 001527Mid-cretaceous sequence stratigraphy and sedimentary cyclicity in the western Paris Basin
Auteurs : Pierre Juignet [France] ; Gérard Breton [France]Source :
- Palaeogeography, Palaeoclimatology, Palaeoecology [ 0031-0182 ] ; 1992.
Abstract
Cenomanian and Turonian depositional patterns of the western Paris Basin are interpreted in terms of sequence stratigraphy. A system tract analysis of the epicontinental “Normandie Basin”, with pelagic chalks, and of the “Maine Platform” covered by clastics, provides evidence for relative changes in coastal onlap; various minor uncomformities are related to these changes of sea level. The four global cycles (UZA or ZC-2.2/2.5) of Haq et al. (1987, 1988) are recognised while an additional one is proposed for the Geslinianum Zone. In addition, periodic rhythmic cycles are commonly registered within the chalk, expressed by the repitition of various facies enhanced both by biosedimentary processes and diagenetic alteration. These elementary climatic cycles allow accurate lithostratigraphic correlations. During this period when the sea level peaked on the tectonically passive border of the Armorican block, the Paris Basin appears to record a detailed set of events which can be correlated with those in the Atlantic, Boreal and Tethyan provinces.
Url:
DOI: 10.1016/0031-0182(92)90067-F
Affiliations:
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A system tract analysis of the epicontinental “Normandie Basin”, with pelagic chalks, and of the “Maine Platform” covered by clastics, provides evidence for relative changes in coastal onlap; various minor uncomformities are related to these changes of sea level. The four global cycles (UZA or ZC-2.2/2.5) of Haq et al. (1987, 1988) are recognised while an additional one is proposed for the Geslinianum Zone. In addition, periodic rhythmic cycles are commonly registered within the chalk, expressed by the repitition of various facies enhanced both by biosedimentary processes and diagenetic alteration. These elementary climatic cycles allow accurate lithostratigraphic correlations. During this period when the sea level peaked on the tectonically passive border of the Armorican block, the Paris Basin appears to record a detailed set of events which can be correlated with those in the Atlantic, Boreal and Tethyan provinces.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Basse-Normandie</li><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Caen</li><li>Le Havre</li></settlement></list><tree><country name="France"><region name="Région Normandie"><name sortKey="Juignet, Pierre" sort="Juignet, Pierre" uniqKey="Juignet P" first="Pierre" last="Juignet">Pierre Juignet</name></region><name sortKey="Breton, Gerard" sort="Breton, Gerard" uniqKey="Breton G" first="Gérard" last="Breton">Gérard Breton</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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