%0 Conference Proceedings %T Passive margin clinothems revisited – TheNew Jersey margin example %+ Géosciences Rennes (GR) %A Proust, Jean-Noël %A Pouderoux, Hugo %A Expedition 313 Science, Party %< avec comité de lecture %( RST 2016, livre des résumés %B 25 ème Réunion des sciences de la Terre (RST 2016) %C Caen, France %P 266 %8 2016-10-24 %D 2016 %K passive margin %K clinothem %K subaqueous delta %K subaerial delta %K sea level %K New Jersey %K Miocene %Z Sciences of the Universe [physics]/Earth Sciences/StratigraphyConference papers %X Passive margin are for a long time used to reconstruct globalsea-level variations at geological time scale for various reasons.They usually show a simple and undeform sedimentary record witha possibility to correlate unconformities regionally and in somecases worldwide, a gradational evolution of depositional environmentsfrom the continental to the deep marine realms includingthe shoreline, and a well-known subsidence history. Sequencestratigraphy proved to be a wonderful tool to decipher the passivemargin sedimentary record from the earliest outcomes of seismicstratigraphy (Vail et al., 1977; Posametier et al., 1988) to themost recent standardization (Catuneanu et al., 2009), applications(Embry 2008-2009) and simplifications (Neal and Abreu, 2009).Numerous hypotheses, however, have not been fully tested yet,like for example, the nature of the sedimentary facies that composethe prograding clinoform bodies on the shelf – a classic endmember of most passive margin sedimentary record (e.g. Mitchumet al. 1977; Berg 1982; Alexander et al. 1991; Pirmez et al. 1998; Hubbard et al., 2010, Helland-Hansen et al., 2012) – the timingand phases relationship of these sedimentary facies with respectto relative sea-level changes (Reynolds et al., 1991) or the paleowater depth of sediment deposited at the toe of the clinoforms(Greenlee and Moore, 1988).This paper sought to ground-truth the vertical succession andlateral facies associations of clinoform deposits in the relativelysimple, passive margin system of the New Jersey shelf by usingthe data provided by the IODP-ICDP Expedition 313 (Mountain,Proust et al., 2010). The arrangement of lithofacies in clinothemdeposits follows complex patterns of prograding shoreface sandsand offshore silts when storm-influenced mud deposits drape theshelf. Gullies incise the top of the clinothems feeding shelfslope apron and toe of slope with turbidites and debrites. Theclinothems are interpreted as the subaqueous counterpart of asubaerial delta detached for more than 60km in the offshore duringtransgressive and early highstand times. The subaerial deltaprogrades rapidly on the shelf during late highstand, forced regressionand lowstand periods feeding the clinothem with sandsand silts and steps back during early transgressive times leavingclinothems sealed by offshore muds.The New Jersey example shows that the model of delta progradationand reservoir partioning in current passive margin settingsshould be strongly revised as well as forcing parameters as relativesea level never dropped below the clinoform rollover duringlowstand times, as predicted by traditional sea level charts. %G English %L insu-01388670 %U https://insu.hal.science/insu-01388670 %~ INSU %~ UNIV-RENNES1 %~ UR2-HB %~ CNRS %~ GR %~ OSUR %~ GIP-BE %~ UR1-HAL %~ UR1-SDLM %~ GR-PPDB %~ UNIV-RENNES2 %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INRAE %~ UR1-ENV %~ GR-P