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Université de Fribourg

The eastern Black Sea-Caucasus region during the Cretaceous: New evidence to constrain its tectonic evolution

Sosson, Marc ; Stephenson, Randell ; Sheremet, Yevgeniya ; Rolland, Yann ; Adamia, Shota ; Melkonian, Rafael ; Kangarli, Talat ; Yegorova, Tamara ; Avagyan, Ara ; Galoyan, Ghazar ; Danelian, Taniel ; Hässig, Marc ; Meijers, Maud ; Müller, Carla ; Sahakyan, Lilit ; Sadradze, Nino ; Alania, Victor ; Enukidze, Onice ; Mosar, Jon

In: Comptes Rendus Geoscience, 2016, vol. 348, no. 1, p. 23–32

We report new observations in the eastern Black Sea-Caucasus region that allow reconstructing the evolution of the Neotethys in the Cretaceous. At that time, the Neotethys oceanic plate was subducting northward below the continental Eurasia plate. Based on the analysis of the obducted ophiolites that crop out throughout Lesser Caucasus and East Anatolides, we show that a spreading center...

Université de Fribourg

Late Cretaceous extension overprinting a steep belt in the Northern Calcareous Alps (Schesaplana, Rätikon, Switzerland and Austria)

Froitzheim, Nikolaus ; Weber, Sebastian ; Nagel, Thorsten J. ; Ibele, Tobias ; Furrer, Heinz

In: International Journal of Earth Sciences - GR Geologische Rundschau, 2012, vol. 101, no. 5, p. 1315-1329

The Triassic to Cretaceous sediment succession of the Lechtal Nappe in the western part of the Northern Calcareous Alps (NCA) has been deformed into large-scale folds and crosscut by thrust and extensional faults during Late Cretaceous (Eoalpine) and Tertiary orogenic processes. The following sequence of deformation is developed from overprinting relations in the field: (D1) NW-vergent folds...

Université de Fribourg

Revision of the planktonic foraminifera Pseudothalmanninella klausi (LEHMANN, 1966) and Globotruncanella semsalensis (CORMINBOEUF, 1961) and first scanning electron microscope (SEM) images of the holotypes

Spezzaferri, Silvia ; Caron, Michèle

In: Revue de Paléobiologie, 2008, vol. 27, no. 1, p. 81-88

The planktonic foraminifera Rotalipora klausi Lehmann, 1966 and Globotruncana? semsalensis Corminboeuf, 1961, were figuredonly by drawings and the specimens were never made publicly available, although deposited in the collections of the Departmentof Geosciences, Fribourg, Switzerland. We present here for the first time their Scanning Electron Microscope documentation andcomparison with the...