Biostratigraphic analysis across the Eocene–Oligocene boundary in the southern Hellenic Thrace basin (Lemnos Island, north Aegean Sea)

Authors : Sofia KOSTOPOULOU, Angelos G MARAVELIS, Avraam ZELILIDIS

Pages : 232-248

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The time interval of the sedimentation in the southern Hellenic Thrace Basin insert ignore into journalissuearticles values(Lemnos Island, northeast Aegean Sea); was studied, based on the qualitative analysis of calcareous nannoplankton and quantitative analysis of planktonic foraminifera. The samples were collected from 4 different stratigraphic sections insert ignore into journalissuearticles values(Ifestia, Panagia, Kaspaka, and Kaminia);. The biostratigraphic analyses on both calcareous nannoplankton and planktonic foraminifera reveal an age of Late Eocene-Early Oligocene insert ignore into journalissuearticles values(Priabonian-Rupelian);. In particular, the Eocene-Oligocene boundary is recorded at the lower part of the turbiditic system, in the Ifestia section. The present study offers the first taxonomic analysis of planktonic foraminifera of this age in the Hellenic southern Thrace Basin insert ignore into journalissuearticles values(Lemnos Island);. The species Catapsydrax unicavus, Chiloguembelina cubensis, Dentoglobigerina sp., Dipsidripella liqianyui, Globigerina officinalis, Paragloborotalia nana, Turborotalia cerroazulensis, and Turborotalia sp. were identified. Furthermore, D. liqianyui adds new data worldwide, as it is identified in the Mediterranean Sea insert ignore into journalissuearticles values(Lemnos Island); for the time interval of the O1-O4 zones insert ignore into journalissuearticles values(Early Oligocene);.
Keywords : Oligocene, planktonic foraminifera, D liqianyui, calcareous nannofossils, Lemnos Island, eastern Mediterranean Sea