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Natural Hazards

, Volume 63, Issue 1, pp 181–195 | Cite as

New approaches in assessment of tsunami deposits in Dalaman (SW Turkey)

  • Bedri Alpar
  • Selma Ünlü
  • Yıldız Altınok
  • Naşide Özer
  • Abdullah Aksu
Original Paper

Abstract

Some earthquakes in the Eastern Mediterranean are tsunamigenic, and some of their tsunamis affected the coastal area of the Gulf of Fethiye, SW Turkey. Recent trenching surveys on the low-lying coastal areas of Dalaman delta beach across the Rhodes Pass revealed three probable tsunami impacts as a result of the historical earthquakes of 1303, 1481, and 1741. Yet there have been relatively few studies of the processes associated with tsunami sediment transport, their deposition, and nature in geological record. In addition to the interpretation of sedimentary features, accurate palaeo-environmental assessments might be possible by distinctive biogeochemical researches on marine-sourced organic matters, geochemical properties, quantitative amounts of marine biomarkers, and deterministic ratios. The identification of major lipid biomarkers (fatty acids and sterols) in the samples recovered from the sidewalls of the studied trench, for example, indicated biogenic contributions due to the presence of phytoplankton, zooplankton, bacteria, and dinoflagellates. Quantitative estimation of biomarkers and deterministic ratios also indicated some evidences for marine-sourced organic matters, implying that biomarkers can be used to answer the open questions in tsunami and palaeo-tsunami researches.

Keywords

Tsunami Tsunami deposits Organic matter Biomarker Fatty acids 

Notes

Acknowledgments

Field studies were done under the Project TRANSFER (Tsunami Risk and Strategies for the European Region) supported by the Commission of European Communities, contract n. 037058, 6th Framework Programme, FP6-2005-Global-4, Reduction of tsunami risks. The authors wish to thank Dr. A.C. Yalçıner and Dr. C. Yaltırak for their guidance and help in the field works. Partial financial support for laboratory analyses was provided by the Research Fund of Istanbul University under the project UDP-6554 allocated to SU.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Bedri Alpar
    • 1
  • Selma Ünlü
    • 1
  • Yıldız Altınok
    • 2
  • Naşide Özer
    • 2
  • Abdullah Aksu
    • 1
  1. 1.Institute of Marine Sciences and ManagementIstanbul UniversityIstanbulTurkey
  2. 2.Geophysical DepartmentIstanbul UniversityIstanbulTurkey

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