Biostratigraphie, paléoécologie et zones d’acmé des foraminifères planctoniques au passage Crétacé-Paléogène dans la Téthys (Tunisie et Espagne) et l’Atlantique (France)

Planktonic Foraminiferal Biostratigraphy and Correlation Across the Cretaceous-Paleogene Transition at the Tethyan and the Atlantic Realms

“…Deep-water benthic foraminifers were less influenced by the K/Pg boundary event, but their diversity and abundance decreased temporarily [15,22,23].…”

“…Consistent debates on the upper Maastrichtian-lower Danian interval based on planktic foraminiferal zonations and biochronology for the middle and lower latitudes are documented ( [7,8,10,[12][13][14][15][16][24][25][26], among others).…”

“…These extinctions affecting many other biological groups of vertebrates and invertebrates induced a major crisis considered as the most severe and catastrophic biological event in the history of our planet. This crisis documented in many research on the foraminifers groups ( [4][5][6], among others) became more accurate until the specialists began to use the high resolution biostratigraphical analyses ( [7][8][9][10][11][12][13][14][15][16], among others).…”

“…and the expanded lower Danian planktic foraminiferal zones and subzones are recorded in them [13,15]. The Global Stratotype Section and Point (GSSP) for the base of the Danian was defined near El Kef, Tunisia [15,27]. The sections of Ellès (Tunisia), Caravaca and Agost (Spain), and Bidart (France), in which the K/Pg boundary event is well recorded, have been proposed to be auxiliary sections for the definition of the K/Pg boundary [13,14,28].…”

“…The principal features of the K/Pg event (Ir anomaly, spinels, etc.) and the expanded lower Danian planktic foraminiferal zones and subzones are recorded in them [13,15]. The Global Stratotype Section and Point (GSSP) for the base of the Danian was defined near El Kef, Tunisia [15,27].…”