New didemnid ascidian spicule records calibrated to the nannofossil data chronostratigraphically in the Quaternary marine deposits of Lake Iznik (NW Turkey) and their paleoenvironmental interpretations

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dc.authorscopusid6505776146
dc.authorscopusid55910085800
dc.authorscopusid6701680974
dc.contributor.authorSagular, Enis Kemal
dc.contributor.authorYümün, Zeki Ünal
dc.contributor.authorMeriç, Engin
dc.date.accessioned2022-05-11T14:17:25Z
dc.date.available2022-05-11T14:17:25Z
dc.date.issued2018
dc.departmentFakülteler, Çorlu Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
dc.descriptionWorkshop on Paleoclimatic and Paleoecological Studies in Turkey's Lakes (TURQLAKES) -- JUN 21-23, 2016 -- Ardahan Univ, Ardahan, TURKEY
dc.description.abstractThis study discusses the detailed chronobiostratigraphic history and paleoenvironmental features in the Quaternary period at Lake Iznik (NW Turkey) based on fossil ascidian spicules and nannofossil records. New ascidian spicule data and nannofossils were identified in three lake bottom mud cores, K-1, K-2, and K-3, and in the muddy sediments of two drilled samples, SK-1 and SK-2. In the samples, eleven fossil ascidian spicule species, including two new species, were recorded: Bonetia acuta Varol & Houghton, Bonetia brevis Varol & Houghton, Bonetia quasitruncata Varol & Houghton, Micrascidites vulgaris Deflandre & Deflandre-Rigaud, M. gothicus sp. nov., Monniotia aciformis Varol & Houghton, M. fasciculata Varol & Houghton, M. minutula sp. nov., Rigaudia multiradiata Varol & Houghton, and R. praecisa Varol & Houghton. Ascidian spicules in the core muds probably released from the Didemnum species (i.e., D. candidum) were compared to Holocene nannofossil data, such as Alisphaera sp., Coronosphaera mediterranea, Emiliania huxleyi, small Gephyrocapsa spp., and Scyphosphaera spp., representing the NN21 Emiliania huxleyi zone. Drilling core sediments also include the same ascidian fossils, and also one nannofossil species, Gephyrocapsa oceanica, indicating the NN21 zone of upper Pleistocene stage, as found in sample SK-1. Based on the ascidian spicules and nannofossil records of the coring/drilled muds of Lake Iznik was marine, as an inlet or lagoon connected to the modern Gulf of Gemlik, during the Pleistocene to Upper Holocene. It was likely separated from the Marmara Sea and turned into a freshwater lake after the upper Holocene. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.
dc.description.sponsorshipTurkish Acad Sci
dc.identifier.doi10.1016/j.quaint.2017.08.060
dc.identifier.endpage155
dc.identifier.issn1040-6182
dc.identifier.issn1873-4553
dc.identifier.scopus2-s2.0-85028716475
dc.identifier.scopusqualityQ1
dc.identifier.startpage143
dc.identifier.urihttps://doi.org/10.1016/j.quaint.2017.08.060
dc.identifier.urihttps://hdl.handle.net/20.500.11776/6350
dc.identifier.volume486
dc.identifier.wosWOS:000437396100014
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorYümün, Zeki Ünal
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofQuaternary International
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAscidian spicule
dc.subjectLake Iznik
dc.subjectNannofossil
dc.subjectQuaternary
dc.subjectStratigraphy
dc.subjectBasin
dc.subjectMarmara
dc.subjectSea
dc.titleNew didemnid ascidian spicule records calibrated to the nannofossil data chronostratigraphically in the Quaternary marine deposits of Lake Iznik (NW Turkey) and their paleoenvironmental interpretations
dc.typeConference Object

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