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Latest Priabonian Larger Benthic Foraminiferal Assemblages At The Demise Of Thesoğucak Carbonate Platform (Thrace Basin And Black Sea Shelf, Nw Turkey):Implications For The Shallow Marine Biostratigraphy, Ali̇ Osman Yücel, Ercan Özcan, Ümi̇tcan Erbi̇l
Latest Priabonian Larger Benthic Foraminiferal Assemblages At The Demise Of Thesoğucak Carbonate Platform (Thrace Basin And Black Sea Shelf, Nw Turkey):Implications For The Shallow Marine Biostratigraphy, Ali̇ Osman Yücel, Ercan Özcan, Ümi̇tcan Erbi̇l
Turkish Journal of Earth Sciences
The Eocene-Oligocene transition corresponds to a significant biotic turnover globally. In shallow marine realms, the larger benthic foraminifera (LBF) belonging to most nummulitids and all orthophragminids became extinct at or near the Eocene/Oligocene boundary, reflecting the environmental deterioration. We here record the advanced developmental stages of midlatitude LBF from the Soğucak Carbonate Platform in NW Turkey on the brink of their extinction in the Tethys. The LBF assemblages in the uppermost part of the platform, exposed in Gökçetepe and Karaburun in the Thrace Basin and Black Sea shelf, are represented by the dominant occurrence of Heterostegina d'Orbigny, 1826, Spiroclypeus Douville, …
The Ypresian To Lutetian Marine Record In Nw Turkey: A Revised Biostratigraphy Andchronostratigraphy And Implications For Eocene Paleogeography, Ercan Özcan, Zahi̇de Özcan, Aral I. Okay, Kenan Akbayram, Aynur Hakyemez
The Ypresian To Lutetian Marine Record In Nw Turkey: A Revised Biostratigraphy Andchronostratigraphy And Implications For Eocene Paleogeography, Ercan Özcan, Zahi̇de Özcan, Aral I. Okay, Kenan Akbayram, Aynur Hakyemez
Turkish Journal of Earth Sciences
The Eocene sedimentary units in the Kocaeli and Armutlu peninsulas and İznik-Geyve region (northwest Turkey) consist of marine siliciclastic and carbonate deposits, locally intercalated with volcaniclastic rocks and tuffs (Middle Eocene Magmatic Rocks-MEMR). The record of larger benthic fauna (LBF) and pelagic microfossils, such as planktonic foraminifera and calcareous nannoplankton, combined with lithological description, indicate a wide spectrum of depositional environments ranging from shallowto deep-marine. These deposits contain in situ and/or allochthonous assemblages of orthophragminids, nummulitids, subordinate rotaliids, and sparse alveolinids. The in situ assemblages (mainly orthophragminids) point to several episodes of shallow marine depositional conditions during a) early Ypresian …