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Microfossil Evidence of Mediterranean Sea-Level Variability from the Shelf’s Edge

Mironovich A. (1), Kanari M. (1,2), Anagnostoudi T. (1), Katz T. (2,3), Goodman-Tchernov B.N. (1,3)

(1) The Dr. Moses Strauss Department of Marine Geosciences, Leon H.Charney School of marine sciences. University of Haifa, Mt. Carmel, Haifa 3498838

(2) Israel Oceanographic & Limnological Research Ltd., Tel-Shikmona, P.O.Box 8030, Haifa 31080, Israel

(3) Interuniversity Institute for Marine Sciences, Eilat 88103, Israel,Interuniversity Institute for Marine Sciences, Eilat 88103, Israel

Accurate reconstructions of past sea-level changes are essential for understanding coastal evolution and predicting future sea-level trends. The Mediterranean continental shelf, with its rich sedimentary record, offers an ideal archive to study these fluctuations. Here, we analyze benthic and planktonic foraminiferal assemblages from a 3.2 meter long core retrieved from a depth of 147 meters. Foraminifera serve as sensitive proxies for water depth, and their species distribution, preservation in the core was examined together with sedimentological data.The lower section (320–180 cm) is dominated by shallow-water benthic foraminifera, common to nearshore depositional settings. The middle section (180–120 cm) is characterized by a mix of shallow and deep-water species, suggesting fluctuating sea levels typical to transitional conditions. The upper section (120–50 cm) is marked by an abundance of planktonic foraminifera, indicative of deeper marine conditions and higher sea levels.. The uppermost interval (40–6 cm), surprisingly, reveals a return to shallow-water species. While this should be an indicator of shallower conditions, additional causal mechanisms such as high energy events (e.g. tsunamis, submarine slumps/earthquakes, large storms) are being considered. The deeper water conditions may promote preservation of these deposits and resulting in a disproportionate presence of anomalous, allochtonous species. Quantitative analyses include the abundance of foraminiferal families, the ratio of planktonic and benthic assemblages, taphonomic consideration such as breakage, and the proportion of agglutinated species. These data provide a record of environmental shifts, shedding light on key depositional events and sea-level dynamics. The research is ongoing, but anticipated to contribute to a broader understanding of paleoceanographic changes in the Mediterranean region, offering valuable insights into the response of continental shelf environments to climatic fluctuations and high energy events.

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