Systematics and biostratigraphy of Oligocene (Rupelian-Early Chattian) foraminifera from lagoonal-very shallow water limestone in the eastern Sivas Basin (central Turkey)

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Ercument Sirel
Nazire Ozgen Erdem
Ozgen Kangal

Abstract

Oligocene (Rupelian-early Chattian) new larger benthic foraminiferal taxons such as miliolid genus Sivasina n. gen., SİREL & ÖZGEN-ERDEM (type species Sivasina egribucakensis n. gen. n. sp. SİREL & ÖZGEN-ERDEM) occurs in the Eğribucak, Bakımlı, Tuzlagözü and Çaygören sections (E of Sivas). One new Rupelian-early Chattian lagoonal-shallowest-water peneroplid species Peneroplis flabelliformis n. sp., SİREL & ÖZGEN-ERDEM from the Eğribucak, Tuzlagözü and Çaygören sections and Rupelian lagoonal two new peneroplid species Coscinospira sivasensis n. sp. SİREL & ÖZGEN-ERDEM, Coscinospira elongata n. sp. SİREL & ÖZGEN-ERDEM from the Eğribucak section (E of Sivas), two new Rupelian shallowest-water alveolinid species Praebullalveolina oligocenica n. sp. SİREL & ÖZGEN-ERDEM and Praebullalveolina minuta n. sp. SİREL & ÖZGEN-ERDEM from the Bakımlı section are described and figured. Furthermore, the description of the known Oligocene soritid species Praearchaias diyarbakirensis SİREL, Praearchaias minimus SİREL, Archaias kirkukensis HENSON, Archaias asmaricus SMOUT & EAMES, peneroplid species P. cf. laevigatus d’ ORBIGNY and austrotrillinid species Austrotrillina brunni MARIE are given shortly. In addition, the biostratigraphy of four studied sections are introduced.

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Article Details

Section
Original Scientific Papers
Author Biographies

Ercument Sirel, Ankara University, Engineering Faculty

Department of Geological Engineering, researcher

 

Nazire Ozgen Erdem, Professor of Geological Engineering

Cumhuriyet University, Faculty of Engineering, Department of Geological Engineering, Sivas 58140

Ozgen Kangal, Assistant Professor of Geological Engineering

Cumhuriyet University, Faculty of Engineering, Department of Geological Engineering, Sivas 58140

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