The Quaternary fluvial-lacustrine system in the Akarçay Basin (SW Anatolia): depositional environments and paleoclimatic interpretation

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dc.contributor.authorAkturk, Koray
dc.contributor.authorKapan, Sevinc
dc.date.accessioned2026-02-03T12:03:22Z
dc.date.available2026-02-03T12:03:22Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe Akar & ccedil;ay Closed Basin, located in southwest Anatolia, contains deformed formations and the drying Ak & scedil;ehir and Eber lakes. This study aimed to interpret the paleoenvironmental and paleoclimatic conditions of the Ak & scedil;ehir and Eber lakes, which are reported to have been connected during the Pleistocene. Based on sedimentological and mineralogical data, three different depositional subenvironments were defined, corresponding to the formation and development stages of the lake. Sedimentary facies analysis of the Pleistocene deposits in the basin revealed the following facies associations, listed from bottom to top: 1) an alluvial fan and fluvial facies association, representing the formation stage of the lake, which developed due to tectonic activity and a humid/wet climate; 2) a lakeshore facies association, corresponding to the expansion stage when the lake spread shallowly, and 3) a lake center facies association, corresponding to the closing stage when the lake began to dry, characterized by limited levels of clastic deposition under very shallow lake conditions. In the lakeshore and lake center facies association, Valvata piscinalis, Dreissena iconica and D. polymorpha species living in shallow waters and streams, as well as Laevicaspia caspia species living in mesohaline environments were identified. X-ray diffraction analysis was performed on the levels that best represented the facies associations in the basin, revealing that the dominant clay minerals in the sequence were illite and kaolinite. Combined evaluation of the sedimentological, mineralogical, and paleontological data suggests that the abundance of Valvata piscinalis and Dreissena iconica-both stream-dwelling species-at levels with increased kaolinite content indicates rainy and humid climatic periods when stream-fed conditions prevailed in the basin. Conversely, the dominance of Laevicaspia caspia and the intervals marked by illite deposition indicate cold and arid climatic periods.
dc.description.sponsorshipScientific Research Projects Coordination Unit of Canakkale Onsekiz Mart University [FDK-2022-4026]
dc.description.sponsorshipDoctoral Scholarship Program in the priority thesis field of Climate Change [YOK 100/2000]
dc.description.sponsorshipThis study (project code: FDK-2022-4026) was supported by the Scientific Research Projects Coordination Unit of Canakkale Onsekiz Mart University. The doctoral thesis was supported by the YOK 100/2000 Doctoral Scholarship Program in the priority thesis field of Climate Change between 2020 and 2024. The article was produced from the doctoral thesis by the first author, supervised by the second author, entitled Sedimentology, Stratigraphy and Paleoclimatic-Paleoenvironmental Properties of the Quaternary Sediments of Aksehir and Eber Lakes. We are grateful to MSc Geological Engineer Harika Marmara for her great contributions on many topics including field studies, laboratory studies and evaluation of paleontological findings.
dc.identifier.doi10.55730/1300-0985.1975
dc.identifier.issn1300-0985
dc.identifier.issue4
dc.identifier.scopus2-s2.0-105007316647
dc.identifier.scopusqualityQ2
dc.identifier.trdizinid1333790
dc.identifier.urihttps://doi.org/10.55730/1300-0985.1975
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/1333790
dc.identifier.urihttps://hdl.handle.net/20.500.12428/35056
dc.identifier.volume34
dc.identifier.wosWOS:001500660000006
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.publisherTubitak Scientific & Technological Research Council Turkey
dc.relation.ispartofTurkish Journal of Earth Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260130
dc.subjectAkar & ccedil;ay Basin
dc.subjectfacies associations
dc.subjectpaleoclimatology
dc.subjectpaleoenvironment
dc.subjectSW Anatolia
dc.subjectQuaternary
dc.titleThe Quaternary fluvial-lacustrine system in the Akarçay Basin (SW Anatolia): depositional environments and paleoclimatic interpretation
dc.typeArticle

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