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Université de Fribourg

Reworked microfossils as a paleogeographic tool

Pirkenseer, Claudius ; Spezzaferri, Silvia ; Berger, Jean-Pierre

In: Geology, 2011, vol. 39, no. 9, p. 843-846

The abundant occurrence of reworked microfossils within the paleogeographically restricted Upper Rhine Graben of central Europe represents a unique opportunity to investigate their inherent information, allowing new insights into the paleogeographic framework and past sedimentary pathways. In the late Rupelian and early Chattian a transgression-regression cycle linked to the global Ru2–Ru3...

Université de Fribourg

Faunal evidence of a holocene pluvial phase in southern Arabia with remarks on the morphological variability of Helenina anderseni

Gennari, Giordana ; Rosenberg, Thomas ; Spezzaferri, Silvia ; Berger, Jean-Pierre ; Fleitmann, Dominik ; Preusser, Frank ; Al-Shanti, Mahmoud ; Matter, Albert

In: The Journal of Foraminiferal Research, 2011, vol. 41, no. 3, p. 248-259

Although foraminifera have been found living in inland saline lakes isolated from the sea, this phenomenon has rarely been recognized in the fossil record. This study documents the occurrence of benthic foraminifera in Holocene lake sediments located nearly 500 km inland from the Red Sea, in the Al-Mundafan region of southern Saudi Arabia. The lake formed during a regional pluvial period,...

Université de Fribourg

Tapiridae (Perissodactyla, Mammalia) of the Swiss Molasse Basin during the Oligocene-Miocene transition

Scherler, Laureline ; Becker, Damien ; Berger, Jean-Pierre

In: Journal of Vertebrate Paleontology, 2011, vol. 31, no. 2, p. 479—496

The Tapiridae of the Swiss Molasse Basin from the late Oligocene to the early Miocene are reviewed. Fossil remains that have not previously been described are identified, old descriptions and identifications from previous works are reassessed, and specimens from Switzerland and France are compared, specifically Protapirus bavaricus from Ebnat-Kappel (MP28) and Rüfi bei Schänis (MP29),...

Université de Fribourg

New skeleton from the early Oligocene of Germany indicates a stem-group position of diomedeoidid birds

De Pietri, Vanesa L. ; Berger, Jean-Pierre ; Pirkenseer, Claudius ; Scherler, Laureline ; Mayr, Gerald

In: Acta Palaeontologica Polonica, 2010, vol. 55, no. 1, p. 23-34

We report a new specimen of the extinct procellariiform species Diomedeoides brodkorbi (Aves, Diomedeoididae) from the early Oligocene (Rupelian) of Rheinweiler in southwestern Germany. The well−preserved partial skeleton allows the recognition and reassessment of new osteological details that bear on the phylogenetic affinities of diomedeoidids. The presence on the coracoid of a deeply...

Université de Fribourg

Sédimentologie et paléontologie des paléoenvironnements côtiers rupéliens de la Molasse marine rhénane dans le Jura suisse

Picot, Laurent ; Becker, Damien ; Cavin, Lionel ; Pirkenseer, Claudius ; Lapaire, Frédéric ; Rauber, Gaëtan ; Hochuli, Peter A. ; Spezzaferri, Silvia ; Berger, Jean-Pierre

In: Swiss Journal of Geosciences, 2008, vol. 101, no. 2, p. 483-513

Aim. To analyse the marine influences of the Rhenish sea in the distal part of the Swiss Molasse Basin (Jura Molasse) during the Early Oligocene, in order to reconstruct the palaeoenvironmental and the palaeogeographical evolution.Location and geological setting. In the Jura Molasse, the Rhenish sea deposits are mainly preserved in three sedimentary basins: Laufen, Delémont and Ajoie. They...

Université de Fribourg

Sédimentologie, paléontologie et paléoenvironnements côtiers de la région de Porrentruy (Sud-Rhénan, Paléogène, Jura, Suisse): implications géodynamiques

Picot, Laurent ; Becker, Damien ; Lapaire, Frédéric ; Ustaszewski, Kamil ; Hug, Wolfgang A. ; Berger, Jean-Pierre

In: Eclogae Geologicae Helvetiae, 2005, vol. 98, no. 2, p. 281-296

Located in the distal part of the Swiss Molasse Basin and in the southern extension of the Rhine Graben, the conglomeratic deposits belonging to the Gompholithes & Conglomérats stratigraphic group have been the object of detailed sedimentological and paleontological studies. The great number of outcrops that came into sight during the building works of the Transjurane highway in the vicinity...

Université de Fribourg

Paléontologie, paléoécologie et évolution des faciès récifaux de l'Oxfordien Moyen-Supérieur (Jura suisse et français)

Dupraz, Christophe ; Strasser, Andreas (Dir.) ; Berger, Jean-Pierre (Codir.)

Thèse de doctorat : Université de Fribourg, 1999 ; no 1257.

The goal of this study was to determine the factors controlling the settlement and the growth of the coral-dominated reefs in the Oxfordian of the Swiss Jura Mountains, and to analyse how eustatic, climatic and trophic variations are recorded. These reefs developed on a relatively wide and very shallow sub-tropical platform, influenced by periodic siliciclastic input. The coral composition is...

Université de Fribourg

Paléoécologie et paléoclimats de la molasse du Jura (oligo-miocène) : apport des Rhinocerotoidea (Mammalia) et des minéraux argileux

Becker, Damien ; Berger, Jean-Pierre (Dir.)

Thèse de doctorat : Université de Fribourg, 2003 ; no 1416.

The Jura Molasse, in which most remains of the studied Rhinocerotoidea remains were found, constitutes a well preserved distal part of the Molasse Basin. This sedimentary series covered a major part of the Jura chain during the Oligocene and Miocene. Today, it is only sporadically found trapped in valleys or preserved in karst fillings. During the Oligo-Miocene period, the Jura region was...