Now showing 1 - 3 of 3
  • Publication
    Geomorphology of the Kalamas river delta (Epirus, Greece)
    (2022) ;
    Adrien Gonnet
    ;
    Eric Fouache
    ;
    Charles Lecoeur
    This article presents the geomorphological mapping of the Kalamas river delta in Thesprotia (Epirus, north-western Greece). The Kalamas (also known as Thyamis) is one of the three main deltas of this region. Detailed mapping was performed through analysis of field geomorphological surveys and interpretation of old maps, satellite images, aerial photos, and DEM. The evolution of the delta as well as its current morphology derives from complex interactions between alluvial, marine dynamics and human activities. Several palaeo-channels have been identified, and the recent morphology of the delta has been altered by the construction of a dam and the canalization of the river during the second half of the twentieth century. The coastline is complex, and mainly consists of lagoons, sandy barriers and sand spits. Since part of the delta has been prograding for about fifty years, the current dynamics indicate erosion as well as progressive submersion of these low coasts.
      67  19
  • Publication
    Glaciations on ophiolite terrain in the North Pindus Mountains, Greece: New geomorphological insights and preliminary 36 Cl exposure dating
    (2022) ;
    Leontaritis, Aris
    ;
    Marrero, Shasta
    ;
    Ribolini, Adriano
    ;
    Hughes, Philip
    ;
    Spagnolo, Matteo
    A glacial geomorphological analysis of three valleys on Mt. Mavrovouni (North Pindus Mountains, Greece) is presented alongside a pilot study using cosmogenic 36 Cl to obtain surface exposure ages from iron-rich ophiolite glacial and periglacial boulders. At least three distinct morphostratigraphic units of glacial (moraines) and periglacial (relict pronival ramparts) origin have been identified. Four 36 Cl surface exposure ages were obtained from the stratigraphically youngest glacial and periglacial deposits. Although this limited dataset with relatively large uncertainties cannot support a robust geochronology, the ages are consistent with the 36 Cl-based chronologies of limestone-derived moraines on Mt. Tymphi (NW Greece) and Mt. Chelmos (S Greece), confirming that the last glaciers on this massif formed during the Last Glacial Maximum as also indicated by other studies in the Pindus mountains. At the same time it provides confidence in the suitability of 36 Cl dating for iron-rich samples, such as ophiolites, using an updated 36 Cl model that incorporates improved production rates for iron spallation. The presented preliminary chronology of moraines and pronival ramparts is based on those ages as well as on local and regional morphostratigraphic correlations. The stabilisation of the most extensive Late Pleistocene glaciers took place during the Last Glacial Maximum, at 27.0 ± 6.5 ka whereas the presence of pronival ramparts dated at 20.2 ± 4.8 ka suggests persisting cold and arid conditions. Older, still undated glacial deposits exist lower in the valleys which can be attributed to the Middle Pleistocene major glaciation phases (MIS 12/MIS 6), based on their relative morphostratigraphic position within the glacial sedimentary sequence.
      55
  • Publication
    The glacial history of Greece: a comprehensive review
    New results from fieldwork in the western region of the Emirate of Abu Dhabi showed meaningful differences in relative sea-level variations during Holocene and recorded unknown late marine highstands. These dynamics may have induced important environmental changes and affected human settlement. Surveys have been carried out in the Emirate of Abu Dhabi in order to construct local sea-level variations. These results rely on identifying, characterizing, and dating sea-level indicators and particularly beachrocks. Two main areas were studied: Ghagha island and Ras Khumays peninsula. Data obtained from our surveys highlight significant differences and suggest local processes that need to be understood. From an archeological perspective, this work helps to better understand human settlement dynamic through the Holocene.
      107  36