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First micropalaeontological record from the early and middle Eocene Mamuca Formation of the Dümrek Basin, western Central Anatolia, Turkey: Biostratigraphy, depositional history and palaeoclimate by Mehmet Serkan Akkiraz; Atike Nazik; Nazire Özgen-Erdem; Sariye Duygu Durak is a Earth and Planetary Sciences article available to read on EtoBox.

What is First micropalaeontological record from the early and middle Eocene Mamuca Formation of the Dümrek Basin, western Central Anatolia, Turkey: Biostratigraphy, depositional history and palaeoclimate about?

This study presents the stratigraphy, biostratigraphy and palaeoecology of a 420- m thick sequence of the Mamuca Formation (Dümrek Basin, Eskişehir, Turkey). The age for the strata of the Mamuca Formation in the Çakıroğlu Creek section is narrowed to late Ypresian-Lutetian (early-middle Eocene) by benthic foraminifera (Nummulites planulatus, N. burdigalensis, Assilina placentula, A. laxispira and A. cuvillieri), planktonic foraminifera (Acarinina bulbroki, Acarinina rohri and Acarinina topilensis) and ostracoda (Eopaijenborchella longicosta and Bairdia gliberti). The sedimentation started in coastal conditions and changed basinward into a shallow marine environment. The palynological assemblage is documented by frequency of palms Spinizonocolpites, Proxaperties and Longapertites, and unknown botanical affinity of Psilodiporites iszkaszentgyoergyi linking them to mangrove environments, along with pteridophytic spores indicating coastal sedimentation. Subsequently, a relative sea-level rise is obvious, leading to a sharp increase in the abundance of organic-walled dinocysts and a decrease in mangroves, almost died-off. The following faulting caused a tectonically triggered subsidence

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Author

Mehmet Serkan Akkiraz; Atike Nazik; Nazire Özgen-Erdem; Sariye Duygu Durak

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)