Publication Date:
2017-04-04
Description:
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)
Description:
‘3HAZ Corinth’ E.U.
research project 004043 (GOCE)-3HAZ-Corinth
Description:
Published
Description:
78 - 104
Description:
3.2. Tettonica attiva
Description:
JCR Journal
Description:
partially_open
Keywords:
coastal uplift
;
marine terraces
;
marine sequences
;
deformation rate
;
Pleistocene
;
Corinth Gulf Reef
;
04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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