Article (Scientific journals)
Patterns of Quaternary uplift of the Corinth rift southern border (N Peloponnese, Greece) revealed by fluvial landscape morphometry
Demoulin, Alain; Beckers, Arnaud; Hubert, Aurelia
2015In Geomorphology, 246, p. 188-204
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Keywords :
Aegean domain; Corinth rift; Geomorphometry; Uplift
Abstract :
[en] The Rift of Corinth is a world-class example of young active rifting and, as such, is an ideal natural laboratory of continental extension. However, though much investigated for two decades, several aspects of the mechanisms at work are still poorly understood. The aim of this paper is a detailed morphometric study of the fluvial landscape response to the tectonic uplift of the rift southern shoulder in order to reconstruct the rift's Quaternary evolution, with special attention to timing, location, and intensity of uplift episodes. Based on the use of a large set of catchment and long profile metrics complemented by the newR/SR integrative approach of the regional drainage network, we identified three distinct episodes of uplift of the northern Peloponnese coastal tract, of which the intermediate one, dated around 0.35–0.4 Ma, is only recorded in the topography of the central part of the rift shoulder, and the youngest one appears to have propagated from east to west over the last 10–20 ka. While net uplift remained minimum in the eastern part of the study area during the whole Quaternary, it shows a clear maximumin the central part of the rift shoulder since 0.4 Ma and an eastward shift of this maximumin recent times. Maximum uplift rates calculated from the morphometric data are of N1.05 and 2–5 mmyear−1 for, the mid-Middle Pleistocene and Holocene uplift episodes, respectively. The morphometric evidence reveals an onshore uplift history remarkably consistent with the rift evolution reconstructed from other data sets. In the long term, it shows a stable pattern of maximum activity in the central part of the rift, confirming previous conclusions about the absence of rift propagation. In the short term, it sheds light on a possible E–Wmigration of the zone of recent uplift, suggesting that in the near future fault activity and seismic hazard might concentrate in the Heliki–Aegion area, at the western tip of this uplift wave.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Demoulin, Alain ;  Université de Liège > Département de géographie > Unité de géographie physique et quaternaire (UGPQ)
Beckers, Arnaud ;  Université de Liège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Hubert, Aurelia  ;  Université de Liège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Language :
English
Title :
Patterns of Quaternary uplift of the Corinth rift southern border (N Peloponnese, Greece) revealed by fluvial landscape morphometry
Publication date :
2015
Journal title :
Geomorphology
ISSN :
0169-555X
eISSN :
1872-695X
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
246
Pages :
188-204
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 July 2015

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