Application of GPR for visualising spatial d distribution and internal structures of tsunami deposits ? Case studies from Spain and Greece

Reconstructing and modeling of paleotsunami events. Multi-proxy approaches, geophysical studies, numerical simulations

Auteur(s) et Affiliation(s)



Description :
The AA. present ground penetrating radar (GPR)data combined with sedimentological methods to rapidly investigate study areas at a high resolution. This approach was tested in 2 different environments. At the Atlantic coast of southern Spain near Barbate (Cádiz), they investigated a cliff with an elevated tsunamite consisting mainly of coarse gravel, shells and a fining-upward sequence covered by a recent soil. In Greece, the ancient harbour of Lechaion is characterised by coarse-grained sediments covering wide areas of the harbour. GPR data indicate the variable thickness of tsunamigenic layers, channel-like structures of backwash deposits, and a non-planar erosion basement. Abrasion-scours were detected in various places and boulder accumulations at the base of the deposits were detected. The AA. show that shallow GPR is suitable for mapping tsunamites, though this method has certain limits and needs additional information for calibration.


Type de document :
Article de monographie

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2013, vol. 57, n°. 4, Supl., p. 29-45, nombre de pages : 17, Références bibliographiques : 4 p.

Date :
2013

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger