DANIAN (SBZ2) LARGER FORAMINIFERA FROM THE BECIRMAN FORMATION (SOUTHEASTERN TURKEY) AS EVIDENCE OF ROTALIIDS DIVERSITY IN LOWER PALEOCENE SHALLOW-WATER ENVIRONMENTS

IF 1.6 3区地球科学 Q2 GEOLOGY

Rivista Italiana Di Paleontologia E Stratigrafia Pub Date : 2022-04-19 DOI:10.54103/2039-4942/15227

Derya Sinanoğlu, A. Benedetti, N. ÖZGEN-ERDEM

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Abstract

An important shallow marine deposit is described and illustrated with focus on the systematics and biostratigraphy of larger foraminifera from three stratigraphic sections of the Becirman Formation from the Batman and Siirt regions (Southeastern Turkey). A quite diverse association, mostly dominated by rotaliids (11 species belonging to 7 genera) and subordinate porcelaneous and agglutinated taxa, is documented as well. The fossil assemblage, including Elazigina dienii, Rotospirella conica, Praelockhartia cf. neoakbari, Cuvillierina cf. sireli associated with Mardinella daviesi and Idalina sinjarica, indicates the late Danian SBZ2. The abundance of rotaliids is linked, in this time frame, to the recovery of the shallow benthic communities after the K/Pg extinction including increase of surface water temperatures and oligotrophy. This was possibly due to the climatic warming recorded at the end of the Danian (Latest Danian Event), thus promoting a rapid adaptative radiation of rotaliids at genus rank.

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来自贝奇曼组（土耳其东南部）的丹麦（SBZ2）大型有孔虫，作为低古新世浅水环境中轮状体多样性的证据

对一个重要的浅海沉积进行了描述和说明，重点介绍了来自巴特曼和锡尔特地区(土耳其东南部)贝基尔曼组三个地层剖面的大型有孔虫的系统学和生物地层学。此外，还发现了一个以轮虫纲(7属11种)和瓷质和凝集类群为主的多样性类群。化石组合包括Elazigina dienii、Rotospirella conica、Praelockhartia cf. neoakbari、Cuvillierina cf. sireli，与Mardinella daviesi和Idalina sinjarica有关联，属于晚Danian SBZ2。在这个时间框架内，轮栖生物的丰度与K/Pg灭绝后浅层底栖生物群落的恢复有关，包括地表水温度的升高和少营养。这可能是由于大年末期记录的气候变暖，从而促进了轮足草属级的快速适应辐射。

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来源期刊

Rivista Italiana Di Paleontologia E Stratigrafia 地学-地质学

CiteScore

3.60

自引率

4.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Rivista Italiana di Paleontologia e Stratigrafia was founded in 1895. It publishes original papers dealing with all fields of paleontology and of stratigraphy, from Italy and the Mediterranean to the Tethys, as well across the globe from China to North America.