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    Geoheritage Potential of Karacabey Floodplain Forest (Turkiye): A Layered Assessment of Paleoecological and Geochemical Archives
    (Springer Heidelberg, 2025) Aykir, Dilek; Curebal, Isa; Fural, Sakir; Kukrer, Serkan; Erginal, Gulsen
    This study aims to evaluate the geoheritage potential of the Karacabey Floodplain Forest (Longoz), located in the Marmara Region of Turkiye, through paleoecological and geochemical archive data. As the largest floodplain forest in the country, Karacabey Longoz represents a typical delta-lagoon-flooded forest system and stands out as a rare wetland ecosystem that chronologically records both natural and anthropogenic processes in its stratified sediments. A 24 cm sediment core extracted from Poyraz Lagoon was analyzed for pollen content, revealing similar to 250-year vegetation and climate change record from a paleoenvironmental perspective. Surface sediment samples from Dalyan Lagoon were examined for heavy metal concentrations and environmental risk indices, indicating significant pollution pressure from industrial and agricultural sources. Using the layered assessment framework developed by Semeniuk and Semeniuk (Hydrobiologia, 708(1), 45-67, 2013), (Australian Journal of Earth Sciences, 66 (6), 2019) for wetland geoheritage evaluation, the site was qualitatively analyzed across five criteria: representativeness, rarity, diversity, archival value, and conservation potential. Findings demonstrate that Karacabey Longoz should be preserved not only for its biological diversity but also as a geoheritage archive documenting environmental and cultural transformations.
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    Records of repeated drought stages during the Holocene, Lake Iznik (Turkey) with reference to beachrock
    (Pergamon-Elsevier Science Ltd, 2016) Ozturk, Muhammed Zeynel; Erginal, Ahmet Evren; Kiyak, Nafiye Gunec; Demirci, Alper; Ekinci, Yunus Levent; Curebal, Isa; Avcioglu, Mustafa
    The cement fabrics, subsurface nature and optically stimulated luminescence age of beachrocks along the shores of Lake Iznik in NW Turkey were studied within the context of Holocene lake level changes. With a maximum thickness of 1.5 m, the low-angle (average 5-10 degrees) beds are composed of coarse grains and small gravels and extend up to 5 m offshore at their most lakeward extremities. Cement textures on and around the poorly-rounded grains are made up of micrite envelopes and meniscus bridges as well as acicular aragonite rims. Geoelectrical resistivity sections taken from a representative location along the beach where the beds have maximum thickness showed that the sand-buried beds are followed up to about 24 m landward. Based on the OSL ages of 33 samples, the cemented beds occurred at four drier periods of the following: Pre- and Early Holocene (dated to 15-9 ka), Holocene Climatic Optimum (7.9-5.6 ka), Middle Holocene (4.9 ka-2.8 ka) and Late Holocene (2.0 ka-0.9 ka). (C) 2015 Elsevier Ltd and INQUA. All rights reserved.