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Full-Text Articles in Physical Sciences and Mathematics
Maastrichtian - Selandian Planktonic Foraminifera Biostratigraphy And Palaeoecological Interpretation Of Akveren Formation In Bartin Area (Western Black Sea, Turkey), Caner Kaya Özer
Bulletin of the Mineral Research and Exploration
The changes in planktonic foraminifera assemblages were studied in two sections composed of clayey limestone, limestone, claystone and marl in the Akveren Formation in the Bartın Province. Pseudoguembelina palpebra, Racemiguembelina fructicosa, Abathomphalus mayaroensis and Pseudoguembelina hariaensis biozones in the Maastrichtian and Parvularugoglobigerina eugubina, Glomobanomalina compressa/Praemurica uncinata, Praemurica uncinata and Morozovella angulata biozones in the Paloecene were determined using planktonic genus and species identified in these sections. Paleoecological interpretations in this study were completed by using the relative abundances of paleoecological species identified in these biozones. The abundance of Rugoglobigerina spp., Heterohelix globulosa, Pseudoguembelina spp., species that tolerated changes in sea …
Maastrichtian-Thanetian Planktonic Foraminiferal Biostratigraphy And Remarks On The K-Pg Boundary In The Southern Kocaeli Peninsula (Nw Turkey), Volkan Sarigül, Aynur Hakyemez, Okan Tüysüz, Şengül Can Genç, İsmai̇l Ömer Yilmaz, Ercan Özcan
Maastrichtian-Thanetian Planktonic Foraminiferal Biostratigraphy And Remarks On The K-Pg Boundary In The Southern Kocaeli Peninsula (Nw Turkey), Volkan Sarigül, Aynur Hakyemez, Okan Tüysüz, Şengül Can Genç, İsmai̇l Ömer Yilmaz, Ercan Özcan
Turkish Journal of Earth Sciences
The Kocaeli Peninsula (NW Turkey) provides one of the best exposed deep marine Upper Cretaceous-Palaeocene sections in north-western Anatolia. The biostratigraphic framework from three sections, namely Belen, Bulduk, and Toylar, in the southern part of the Kocaeli Peninsula is established by means of planktonic foraminifera. A very rich planktonic foraminiferal assemblage analysed both in thin sections and washed residues records a biozonation ranging from the Contusotruncana contusa (CF6) Zone (Maastrichtian) to the Globanomalina pseudomenardii (P4) Zone (Thanetian). Although a major part of the biozones in the studied interval is clearly defined, the upper three zones (CF1-3) of the latest Maastrichtian …