1. Submerged notches and doline sediments as evidence for Holocene subsidence
- Author
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Evelpidou, N., Pirazzoli, P.A., Saliège, J.-F., and Vassilopoulos, A.
- Subjects
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HOLOCENE paleoceanography , *SEDIMENTATION & deposition , *SUBMERGED lands , *ABSOLUTE sea level change , *EARTHQUAKES , *EROSION , *RADIOCARBON dating , *OCEANOGRAPHY , *BAYS - Abstract
Abstract: The possibility of Holocene subsidence along the northern coast of the Corinth Gulf is often mentioned in the literature; however, systematic detailed evidence that submergence (e.g. of archaeological remains) does not simply depend from eustatic sea-level rise is most often missing. In this paper, a new detailed study of submerged tidal-notch profiles along the limestone coast has shown that periods of sea-level stability are intercalated with periods of rapid subsidence or gradual relative sea-level rise. It appears that most of the sites considered, seem to have been affected by a relatively recent co-seismic subsidence of about half a meter, whereas during the longer period, by stages of relative sea-level stability and/or gradual relative sea-level rise. This evidence of subsidence is confirmed by radiocarbon dating in doline sediments, suggesting that during certain periods, a relative sea-level rise was much faster than the raising suggested by glacio-eustatic or hydro-isostatic estimations. Juxtaposing a list of known earthquakes occurred in the area shows that several earthquakes (e.g. the 1981 one for the easternmost sites considered) are potential candidates for the recent co-seismic displacements and thus supporting the geomorphological interpretations. [Copyright &y& Elsevier]
- Published
- 2011
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