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national and Capodistrian Univesrity of Athens, Faculty of Geology and Geoenvironment
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- PublicationOpen AccessGeomorphological, stratigraphic and geochronological evidence of fast Pleistocene coastal uplift in the westernmost part of the Corinth Gulf Rift (Greece)(2009)
; ; ; ; ; ; ; ; ;Palyvos, N.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Mancini, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Sorel, D.; Université Paris-Sud, Centre d'Orsay, Faculty of Geology ;Lemeille, F.; Institut de Radioprotection et de Surete Nucléaire, Seismic Hazard Division, Fontenay-aux-roses ;Pantosti, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Julia, R.; Institute of Earth Sciences Jaume Almera, Barcelona ;Triantaphyllou, M.; National and Kapodistrian University of Athens ;De Martini, P. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; ; ; ; ; ; Rapid extension and active normal faulting in the western extremity of the Corinth Gulf are accompanied by fast coastal uplift.We investigate Pleistocene uplift west of Aigion, by attempting to date remains of marine terraces and sedimentary sequences by calcareous nannoplankton and U-series analyses. Net uplift initiated recently, due to abandonment of an older rift-bounding fault zone and increase in activity on the presently active, coastal fault zone. This change apparently coincides with an abrupt slow down (or, termination) of secondary fault block tilting within the broader hangingwall block of the older zone, indicated by an angular unconformity that dates in the early part ofMIS10 ( 390–350 ka BP, preferably, in the earlier part of this period). Net uplift driven by the coastal zone resulted in the formation of MIS9c (330 ka) and younger terraces. The formation of the unconformity and the initiation of net uplift coincide temporally with a 300–400 ka unconformity recognized by recent studies in a wide area offshore Aigion i.e. they could be part of an evolutionary event that affected the entirewestern part of the Corinth Rift or, a large area therein. Uplift rate estimates at four locations are discussed with reference to the morphotectonic context of differential uplift of secondary fault blocks, and the context of possible increase in uplift ratewith time. Themost reliable and most useful estimate for uplift rate at the longitude of the studied transect is 1.74–1.85mm/year (time-averaged estimate for the last 240 ka, based on calcareous nannoplankton and sequence-stratigraphic interpretation)239 587 - PublicationRestrictedReview and new data on uplift rates at the W termination of the Corinth Rift and the NE Rion Graben area (Achaia, NW Peloponnesos)(2007-05)
; ; ; ; ; ; ; ; ;Palyvos, N.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Sorel, D.; Université Paris-Sud, Faculty of Geology ;Lemeille, F.; Institut de Radioprotection et de Surete Nucléaire, Seismic Hazard Division ;Mancini, M.; CNR- Istituto di Geologia Ambientale e Geoingenieria ;Pantosti, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Julia, R.; Institute of Earth Sciences Jaume Almera, Barcelona ;Triantaphylou, M.; national and Capodistrian Univesrity of Athens, Faculty of Geology and Geoenvironment ;De Martini, P. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; ; ; ; ; ; We review and present new geochronological data on the uplifted Middle-Late Pleistocene marine deposits at the western termination of the Corinth Rift and the Rion area. Geomorphological and geological observations define the general morphotectonic context of these deposits, which predicts a pattern of differential uplift. Uplift rate estimates based on previous geochronological data (ranging from 0.4 to 6 mm/yr) are discussed in the proposed morphotectonic context of differential uplift, together with estimates from new geochronological data. Based on the data available for post-MIS11 marine deposits, we conclude that time-averaged uplift rates in the last 300-200 ka have been higher than ca. 1.8 mm/yr at the areas of faster uplift (e.g. Profitis Elias, Ano Kastritsi). To define just how higher than 1.8 mm/yr they have been, and to cross-check the validity of very high uplift rate estimates (≥ 4 mm/yr) existing in the bibliography, more datings than those available are required.150 26