Université de Fribourg

Geomorphic response to the lateglacial–holocene transition in high alpine regions (Sanetsch pass, Swiss alps)

Serra, Elena ; Valla, Pierre G. ; Gribenski, Natacha ; Guedes Magrani, Fabio ; Carcaillet, Julien ; Delaloye, Reynald ; Grobéty, Bernard ; Braillard, Luc

In: Boreas, 2020, p. bor.12480

Several palaeoclimatic archives have documented the pronounced climatic and environmental change associated with the Lateglacial–Holocene transition in the European Alps. However, the geomorphic response to this major environmental transition has only been punctually investigated. In this study, we propose a detailed reconstruction of post‐Last Glacial Maximum palaeoenvironmental...

Université de Fribourg

Erosion and sediment transfer processes at the front of rapidly moving rock glaciers: Systematic observations with automatic cameras in the western Swiss Alps

Kummert, Mario ; Delaloye, Reynald ; Braillard, Luc

In: Permafrost and Periglacial Processes, 2017, vol. 29, no. 1, p. 21–33

When connected to torrential channels, the fronts of active rock glaciers constitute important sediment sources for gravitational transfer processes. In this study, a 2013– 16 time series of in situ webcam images from the western Swiss Alps was analyzed to characterize the erosion processes responsible for sediment transfer at the front of three rapidly moving rock glaciers and their...

Bibliothèque cantonale jurassienne

Occupations protohistoriques au sud de Delémont : de l’âge du Bronze final au Second âge du Fer

Wey, Othmar ; Braillard, Luc

Porrentruy : Office de la culture et Société jurassienne d'émulation, 2011

(Cahiers d'archéologie jurassienne ; 31)

ISBN: 9782884360265

Université de Fribourg

Effects of Bears on Rockshelter Sediments at Tanay Sur-les-Creux, Southwestern Switzerland

Braillard, Luc ; Guélat, Michel ; Rentzel, Philippe

In: Geoarchaeology, 2004, vol. 19, no. 4, p. 343-367

Sur-les-Creux rockshelter is located in the Prealps of southwestern Switzerland. The sequence of deposits in the rockshelter is 80 cm thick and consists of weathered gravels in a phosphate-rich matrix. A few Middle Palaeolithic artifacts and the bones of cave bear (Ursus spelaeus) were recorded in the fill. We present the results of sedimentological, geochemical, and micromorphological analyses...

Université de Fribourg

Une nappe alluviale étagée du Pléistocène supérieur dans la vallée de Delémont (Jura suisse) : lithostratigraphie et datation

Braillard, Luc ; Guélat, Michel

In: Quaternaire, 2008, vol. 19, no. 3, p. 217-228

La vallée de Delémont, dans le Jura suisse, est caractérisée par un système de trois nappes alluviales étagées, T1, T2 et T3, mises en place en contexte périglaciaire. Cet article présente la stratigraphie détaillée de la plus haute de ces terrasses, T3, correspondant à des graviers fluviatiles revêtus par des dépôts limoneux qui montrent un horizon fragipan et des polygones de gel...

Université de Fribourg

Morphogenesis of the Sarine canyon in the Plateau Molasse, Switzerland: new data from an archaeological site

Braillard, Luc ; Mauvilly, Michel

In: Geographica Helvetica, 2008, vol. 63, no. 3, p. 181-187

The 50 to 100 metre deep canyon of the Sarine River that develops north of the prealpine front in the Molasse Plateau is classically attributed to postglacial erosion. However, the discovery of a Mesolithic archaeological site (~ 8600 years cal. BP), located at the bottom of the gorge five metres above the actual river bed, has evident implications for the canyons morphogenesis. This new...

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