Université de Fribourg

Remarks on the identification of the Albian/Cenomanian boundary and taxonomic clarification of the planktonic foraminifera index species globotruncanoides, brotzeni and tehamaensis

Petrizzo, Maria Rose ; Caron, Michèle ; Silva, Isabella Premoli

In: Geological Magazine, 2015, vol. 152, no. 3, p. 521-536

The planktonic foraminifera assemblage across the Global Boundary Stratotype Section and Point (GSSP) for the base of the Cenomanian Stage defined at Mont Risou (Haute-Alpes in France) is here restudied to clarify the identification and stratigraphic distribution of Thalmanninella globotruncanoides ( = Rotalipora globotruncanoides Sigal, 1948) and Pseudothalmanninella tehamaensis ( =...

Université de Fribourg

Sedimentary sources of the mud-breccia and mud volcanic activity in the Western Alboran Basin

Gennari, Giordana ; Spezzaferri, Silvia ; Comas, M.C. ; Rüggeberg, A. ; Lopez-Rodriguez, C. ; Pinheiro, L.M.

In: Marine Geology, 2013, vol. 339, p. 83–95

During the TTR-17 Leg 1 cruise in the West Alboran Basin, gravity cores were acquired from three mud volcanoes (MVs): Dhaka, Carmen and the recently discovered Maya. This paper presents micropaleontological and radiocarbon dating results from the three mud volcanoes, using cores containing mud breccias overlain by and interbedded with hemipelagic sediments. At Dhaka MV, the mud-breccia matrix...

Université de Fribourg

Late Eocene impact-induced climate and hydrological changes: Evidence from the Massignano global stratotype section and point (central Italy)

Coccioni, Rodolfo ; Frontalini, Fabrizio ; Spezzaferri, Silvia

In: Geological Society of America Special Paper, 2009, vol. 452, p. 97–118

The Eocene-Oligocene transition marks the passage from “greenhouse” conditions to an “icehouse state” with progressive global cooling starting in the early middle Eocene. The late Eocene is also characterized by a high concentration of extraterrestrial impacts, the effects of which, on living organisms and climatic changes, are still not understood. We carried out a high-resolution...