Danian (Sbz2) Larger Foraminifera From the Becirman Formation (Southeastern Turkey) as Evidence of Rotaliids Diversity in Lower Paleocene Shallow-Water Environments

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.

Biostratigraphic investigations assisted by virtual outcrop modeling: a case study from an Eocene shallow-water carbonate succession (Val Rosandra gorge, Trieste, NE Italy)

“…Key biological and climate events, such as the benthic aftermath of the Cretaceous-Paleocene (K-Pg) mass extinction and the hyperthermal event at the Paleocene-Eocene boundary (PETM; see Zamagni et al, 2012) are recorded along. A great diversity for larger Foraminifera is observed already soon after the K-Pg (Drobne et al, 2014;Sinanoğlu et al, 2022) and throughout the whole Paleocene and Eocene (Hottinger, 2001;Benedetti & Papazzoni, 2022) punctuated by repeated bioevents, used in biostratigraphy for the identification of standard biozones, named Shallow Benthic Zones (Serra-Kiel et al, 1998) that are, for the Paleocene, also calibrated with the calcareous nannofossil biostratigraphic scale (SBP; Papazzoni et al, 2023).…”