Relative sea level changes and regional tectonic evolution of seven coastal areas in NW Greece since the mid-Holocene |
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| Institution: | 1. Geocycles Research Centre, University of Mainz, 55099 Mainz, Germany;2. ARC Centre of Excellence for Core to Crust Fluid Systems and Department of Earth Sciences, Macquarie University, North Ryde, New South Wales 2109, Australia;3. Institute for Geosciences, University of Mainz, 55099 Mainz, Germany;4. Römisch-Germanisches Zentralmuseum, Ernst-Ludwig-Platz 2, 55116 Mainz, Germany;5. Institute of Prehistory and Early History, University of Mainz, 55099 Mainz, Germany;6. Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, P.O. Box 3060, 55020 Mainz, Germany;7. Institute of Botany and Botanical Garden, University of Mainz, 55099 Mainz, Germany;8. Department of Geography, University of Mainz, 55099 Mainz, Germany;9. Institute of Anthropology, University of Mainz, 55099 Mainz, Germany;10. Monrepos Archaeologisches Forschungszentrum und Museum für Menschliche Verhaltensevolution, Schloss Monrepos, 56567 Neuwied, Germany;11. Institute for Spatial Information and Surveying Technology (i3Mainz), Mainz University of Applied Sciences, Lucy-Hillebrand Strasse 2, 55128 Mainz, Germany;12. Institute for Physics of the Atmosphere, University of Mainz, 55099 Mainz, Germany;1. Inst. of Earth Sciences-Geochemistry, Geosciences Utrecht University, 3584 CD Utrecht, The Netherlands;2. Geological Institute, ETH Zurich, 8092 Zurich, Switzerland;1. Research Group for Terrestrial Paleoclimates, Max Planck Institute for Chemistry, Hahn-Meitner Weg 1, 55128 Mainz, Germany;2. Chair of Physical Geography, Faculty of Science and Mathematics, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia;3. Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala SE-75236, Sweden;4. Institute for Geological and Geochemical Research Research, Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, 1112 Budapest, Budaörsi út 45, Hungary;5. Centre for Nuclear Technologies, Technical University of Denmark, Risø Campus, Roskilde DK-4000, Denmark;6. IMCCE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ Paris 06, Univ Lille, 75014 Paris, France;7. Nordic Laboratory for Luminescence Dating, Department of Geosciences, University of Aarhus, DTU Nutech, Risø Campus, Roskilde DK-4000, Denmark;8. BayCEER and Chair of Geomorphology, University of Bayreuth, 95440 Bayreuth, Germany;9. Institute for Geography, University of Mainz, Johann-Joachim-Becher Weg 21, 55099 Mainz, Germany;10. Department of Geography, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany;11. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China;12. Organic Geochemistry Group, MARUM-Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, D-28359 Bremen, Germany;13. Institue of Speleology, Romanian Academy, Clinicilor 5, 400006 Cluj-Napoca, Romania;14. Interdisciplinary Research Institue on Bio-Nano-Science of Babe-Bolyai University, 400006 Cluj-Napoca, Romania;15. Leibniz Institute for Applied Geophysics (LIAG) Geochronology and Isotope Hydrology, 30655 Hannover, Germany;1. Laboratory of Geology for Aquatic Systems, Technological Educational Institute of Mesolonghi, Nea Ktiria, 30200 Mesolonghi, Greece;2. Department of Geology, University of Patras, 26504 Patras, Greece;3. Department of Mechanical Engineering, Technological Educational Institute of Patras, 26334 Patras, Greece;1. Institute for Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Köln (Cologne), Germany;2. Institute of Geosciences, University of Kiel, Otto-Hahn-Platz 1, 24118 Kiel, Germany;3. Heinrich Schliemann-Institute for Ancient Studies, University Rostock, 18051 Rostock, Germany;4. German Archaeological Institute (DAI), İnönü Caddesi 10, 34437 İstanbul, Turkey;5. Institute for Geography, Johannes Gutenberg-Universität Mainz, Johann-Joachim-Becher-Weg 21, 55099 Mainz, Germany |
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| Abstract: | This study presents relative sea level (RSL) curves for seven coastal areas in Akarnania and the northwestern Peloponnese (NW Greece) since the mid-Holocene. RSL fluctuations are deduced from 48 14C-AMS dated sedimentological sea level markers from 27 vibracores drilled in near-coast geological archives as well as from six geoarchaeological sea level indicators of known ages. Seven palaeo sea level curves including uncertainty bands are reconstructed for a coastal zone spanning a distance of 150 km. Considerable intra-regional differences in sea level evolution exist. These differences are mainly due to tectonic reasons. In general, RSL in northwestern Greece has never been higher than today. Rates of local sea level rise were highest until 5500–5000 cal BC (up to 12.3 m/ka) and lowest during 4000–500 cal BC (0.2–1.4 m/ka). During the past 2500 or so years, RSL has accelerated anew (0.7–2.7 m/ka). Calculating differences between local mean sea level curves provides quantitative information on intra-regional differences of tectonic activity. The coastal plains of Palairos and Elis show signs of uplift, whereas the Mytikas and Boukka plains are strongly subsiding. Compared to other areas of the eastern Mediterranean, northwestern Greece has been subject to significant net long-term subsidence. Regional tectonic events (RTEs) were detected for the time around 4000, 2500, 500 and 250 cal BC as well as around 250 and 1250 cal AD. RTEs are characterized by changes of uplift/subsidence rates or by the redirection of local tectonic movements. The question if some of the RTEs were of a supra-regional nature is still open. From a geodynamic point of view, the results presented show that Akarnania's southwestern fringe is being downwarped while the tectonic block as a whole is moving towards the southwest. Strongest subsidence rates are observed for central Akarnania. At Akarnania's fringes, subsidence is reduced by the influence of strong uplift of adjacent areas such as around Preveza and the northern Peloponnese. |
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