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High-Resolution Seismic Reflection Profiles for the Reconstruction of Postglacial Transgressive Shorelines: An example from Greece

Published online by Cambridge University Press:  20 January 2017

Tjeerd H. van Andel  and
Nikolaos Lianos
Tjeerd H. van Andel
Affiliation:
Geology Department, Stanford University, Stanford, California, 94305
Nikolaos Lianos
Affiliation:
Ephoria Enalion Archaiotiton, 58 Omirou, Athens, Greece
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Abstract

In 1982 we carried out a shallow-penetration, high-resolution seismic profiling study on the shelf of the southern Argolid, Peloponnesos, Greece, to identify and map the shores of the late Pleistocene and Holocene, and to establish their coastal environments. Portable equipment and a local boat were used. The lowest glacial shore occurs at −115 to −118 m, within the range of global values. The subsequent rise across the distinct old land surface left behind many shore features (scaps, beaches and beach ridges, channels and lagoons) now buried under a few meters of post-transgressive deposits. These features cluster at a small number of depths below present sea level, suggesting that the rise of the sea, usually too fast to leave an imprint, was episodically interrupted by brief stillstands or even temporary reversals of climatic or tectonic origin. The clusters can be roughly dated with reference to a global sea-level-rise curve; after 6000 yr B.P. sparse archaeological data establish a local curve. The seismic profiling technique, convenient and not costly, holds promise for the identification of postglacial shores elsewhere prior to sampling for dating. It has wide application for environmental reconstructions of vanished coastal zones as a basis for prehistoric resource assessments. These applications are illustrated with examples from this study.

Type
Research Article
Information
Quaternary Research , Volume 22 , Issue 1 , July 1984 , pp. 31 - 45
Copyright
University of Washington

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