@article {8492,
	title = {Laffitteina from the Maastrichtian-Thanetian shallow marine carbonates of the Aur{\`e}s Basin (Northeastern Algeria): microfacies and stratigraphic distribution},
	journal = {Bolet{\'\i}n de la Sociedad Geol{\'o}gica Mexicana},
	volume = {75},
	number = {1},
	year = {2023},
	abstract = {
	The Maastrichtian-Thanetian Ncham Member of the Aur{\`e}s Basin in northeastern Algeria contains variably lenticular microfossils, which are defined as Laffitteina genera. It is a large benthic foraminifera, studied from three stratigraphic sections. The systematic study of Laffitteina led identification of nine species, four of which, Laffitteina marsicana, L. aff. mengaudi, L. monodi and L. erki were recorded for the first time in the study area. Various species of Laffitteina were used as index fossils to recognize the K/Pg transition in the Aur{\`e}s Basin. The last occurrence of L. oztuerki marks the end of the Maastrichtian, which was found in association with Omphalocyclus macroporus (Lamarck) in the upper Maastrichtian. The first occurrence of L. erki marks the Thanetian age, while the Danian and Selandian deposits are missing in the field after a general emersion in the early Paleocene, despite the absence of a visible non unconformity. It could therefore be proposed that the K/Pg transition may occurs in the last 10 m of the Ncham Member. Concerning the paleoenvironment, Laffitteina is considered as a resistant foraminifera and thrives in meso-to eutrophic environments (lagoon). Microfacies data from the Upper Cretaceous-Lower Paleogene limestones of the Aur{\`e}s Basin suggests a carbonate platform with shallowing-up sequential organization, mainly controlled by fluctuations in sea-level.

},
	url = {https://www.scielo.org.mx/scielo.php?pid=S1405-33222023000100001\&script=sci_arttext\&tlng=en},
	author = {Benmansour, Sana}
}
