First note on Holocene coquinite on Thrace (Black Sea) coast of Turkey

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dc.authoridDemirci, Alper/0000-0002-8710-6232
dc.authoridEkinci, Yunus Levent/0000-0003-4966-1208
dc.contributor.authorErginal, Ahmet Evren
dc.contributor.authorEkinci, Yunus Levent
dc.contributor.authorDemirci, Alper
dc.contributor.authorElmas, Elmas Kirci
dc.contributor.authorKaya, Hakan
dc.date.accessioned2025-01-27T20:27:20Z
dc.date.available2025-01-27T20:27:20Z
dc.date.issued2012
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this paper, preliminary results concerning the nature, subsurface structure and age of carbonate-cemented coquinite extending along a 1.5-km long and 40-m wide loose coquina beach on the Thracian (west Black Sea) coast of Turkey are presented. An Electrical Resistivity Tomography (ERT) survey showed that the coquinite has a maximum thickness of about 2 m and comprises seaward dipping buried 20 m-wide slabs under beach materials at the backshore. Cemented by low-magnesian calcite, the coquinite contains various bivalvia, benthic foraminifera, calcareous nannofossils or coccoliths and quartz sands. Diagenesis of the coquinite occurred as the result of sequential cementation, starting with the precipitation of micritic envelops typical of a marine phreatic zone. This early stage was followed by pore-lining cements and bladed rims composed of equal-sized subhedral and anhedral crystals of calcite, suggesting evidence of meteoric phreatic and meteoric vadose environments, respectively. Calibrated values from radiocarbon dating of four bulk samples of bivalvia revealed that the coquinite shells were deposited between 3730 and 2850 years BP. During that period the sea-level was similar to the present at an early stage then dropped to 2 m due to Phanagorian regression (between 3200 and 2200 BP), which is evidenced by consecutive cementation patterns of distinctive origin. (C) 2012 Elsevier B.V. All rights reserved.
dc.description.sponsorshipResearch Foundation of Canakkale Onsekiz Mart University [2011/41]
dc.description.sponsorshipDr. Aydin Buyuksarac is thanked for allowing us to use the resistivity-meter for this research. Thanks are also due to Mrs. Rezzan Ekinci for her great efforts during the data acquisition stage of the geoelectrical survey. We wish to thank Mr. Graham Lee for correction of English text. We are also indebted to the journal editor Dr. Jasper Knight, and the referees Dr. Ron Martin, Dr. Marcelo Manassero and an anonymous referee for their constructive comments that have greatly improved our paper. This study was supported by Research Foundation of Canakkale Onsekiz Mart University (project number: 2011/41).
dc.identifier.doi10.1016/j.sedgeo.2012.05.008
dc.identifier.endpage62
dc.identifier.issn0037-0738
dc.identifier.issn1879-0968
dc.identifier.scopus2-s2.0-84863007885
dc.identifier.scopusqualityQ1
dc.identifier.startpage55
dc.identifier.urihttps://doi.org/10.1016/j.sedgeo.2012.05.008
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22660
dc.identifier.volume267
dc.identifier.wosWOS:000306584100005
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Bv
dc.relation.ispartofSedimentary Geology
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectCoquinite
dc.subjectCross-bedding
dc.subjectCementation
dc.subjectElectrical Resistivity Tomography (ERT)
dc.subjectThrace
dc.subjectBlack Sea
dc.titleFirst note on Holocene coquinite on Thrace (Black Sea) coast of Turkey
dc.typeArticle

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