A historical review of the extinction, survival, and evolutionary models planktic foraminifera proposed for Cretaceous/Paleogene boundary (KPB) mass extinction event sometimes leaves impression that there is still no conclusive evidence to support any single one them. Two main have been put forward: i) catastrophic almost total some authors, compatible with geologically instantaneous paleoenvir...

The size of the last glacial ice sheet on Northeast (NE) Greenland shelf and its interaction with ocean circulation have been subject debate. Here we provide insights into extent around Last Glacial Maximum (LGM) investigate timing strength changes in flow Atlantic Water. study is based a multiproxy investigation marine sediment core, gravity core DA17-NG-ST01-019G, from 323-m water depth at NE...

Submarine gravity flow processes on carbonate platform slopes can lead to the deposition of calciturbidite and calcidebrite beds adjacent deep-water seafloor. Such deposits have been previously found occur more frequently during sea-level highstands, leading increased export carbonates deep sea interglacial periods. Here, we document a new occurrence these types event in cores near series volca...

We present new Holocene and glacial dO data measured on planktonic foraminifera Neogloboquadrina pachyderma and benthic foraminifera Cibicidoides species from the Atlantic and Pacific sectors of the Southern Ocean in order to better understand its glacial hydrography. Combined with previously published data, the latitudinal dO distributions of these foraminifera show no appreciable difference d...

[1] Eocene Thermal Maximum 2 (ETM2; ∼53.7 Ma) occurred approximately 2 Myr after the Paleocene‐ Eocene Thermal Maximum (∼55.5 Ma) and was characterized by a deep‐sea warming of >3°C, associated with massive release of carbon into the ocean‐atmosphere system. We performed single‐specimen stable isotope analyses of the planktic foraminiferal genera Acarinina (surface dweller) and Subbotina (therm...

The symbiont-bearing mixed-layer planktic foraminiferal genera Morozovella and Acarinina were among the most important calcifiers of early Paleogene tropical-subtropical oceans. A marked and permanent switch in the abundance of these genera is known to have occurred at low-latitude sites at the beginning of the Early Eocene Climatic Optimum (EECO), such that the relative abundance of Morozovell...

AbstractThe Aitamir Formation is divided into two members the lower sandstone and the upper shale. 32 genera and 57 species of foraminifera have been recognized. According to identified foraminifera Rotalipora appenninica Interval Zone, Rotalipora globotruncanoides (Rotalipora brotzeni) interval zone and Whiteinella aumalensis-Dicarinella canaliculata assemblage zone are proposed and a l Albian...