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DYNAMIQUES SPATIALES ET RECONSTITUTIONS PALÉOGEOGRAPHIQUES DE LA PLAINE DE THESSALONIQUE (GRÈCE) À L'HOLOCÈNE RÉCENT

Abstract : The Thessaloniki plain is the largest deltaic complex of Greece, spanning an area of approximately 2 200 km². The present research aims to reconstruct the morphologic evolution of this coastal plain which has been formed during the last six millennia. This study is based on a method which combines historical geography and a palaeoenvironmental approach. The different steps in the formation of this coastal plain by silt from the Aliakmon and Axios Rivers, have been detailed.
From a historical standpoint, it is an important area. Since Neolithic times, a continuous occupation is attested. Various archaeological, historical and palaeoenvironmental researches have highlighted a rapid displacement in the shoreline between the fourth millennium BC and the fifth century AD, but unfortunately they did not identify the landscape evolution. The Macedonian kingdom, famous for rulers such as Philip II and Alexander the Great, flourished in the area, resulting in numerous archaeological remains which confirm the rapid evolution of the coastline. Pella, the former capital and an important harbour during Macedonian times, is nowadays located 28 km inland.
A careful review of literary sources, ancient texts and maps dating from ancient times to the descriptions of 18th and 19th century travellers allowed inference of changes in the shoreline and in the hydrographical network. Using these documents, the first palaeogeographic reconstructions were established and revealed several misunderstandings and contradictory scenarios due to different interpretations of literary sources.
This research offers a new perspective and understanding of the evolution of the Thessaloniki plain based on chronostratigraphical evidences derived from height boreholes. Faeces identification, together with grain-size analysis and magnetic susceptibility measurements, reveal different environments of sediment deposition.
Chronostratigraphical evidence was obtained from seventeen radiocarbon dates performed on marine shells, peat and organic sediment samples. Using remote sensing and a combination of spectral bands (LANDSAT TM imagery) and accurate topographic data (S.R.T.M. data), a spatial interpretation of the chronostratigraphic sequences was possible. Several digital elevation models showing the palaeogeographic reconstruction and the shoreline displacements along the last six millennia were then established.
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Submitted on : Thursday, December 27, 2007 - 1:47:16 PM
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Matthieu Ghilardi. DYNAMIQUES SPATIALES ET RECONSTITUTIONS PALÉOGEOGRAPHIQUES DE LA PLAINE DE THESSALONIQUE (GRÈCE) À L'HOLOCÈNE RÉCENT. Géographie. Université Paris XII Val de Marne, 2007. Français. ⟨tel-00201255⟩

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