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Université de Fribourg

Seismotectonic analysis around the Mont Terri rock laboratory (Switzerland): a pilot study

Abednego, Martinus ; Blascheck, Patrick ; Schefer, Senecio ; Nussbaum, Christophe ; Joswig, Manfred ; Bossart, Paul ; Mosar, Jon

In: Swiss Journal of Geosciences, 2017, vol. 110, no. 1, p. 233–251

For this pilot study we used recorded seismic events from the SED permanent network and data from a dedicated SNS network to improve the seismotectonic understanding of very weak seismicity in the vicinity of the Mont Terri underground laboratory. We combined field data on faults with microseismic events and modelling of stress and focal mechanisms. Eighty-six events with very low magnitudes...

Bibliothèque publique et universitaire de Neuchâtel

Etudes sur les glaciers / par L. Agassiz

Agassiz, Louis ; Bettannier, Joseph

Neuchâtel : Aux Frais de l'auteur ; Soleure : En Commission chez Jent et Gassmann, 1840

Université de Fribourg

Integrated bio- and cyclostratigraphy of Middle Triassic (Anisian) ramp deposits, NW Bulgaria

Ajdanlijsky, George ; Strasser, André ; Götz, Annette E.

In: Geologica Carpathica, 2019, vol. 70, no. 4, p. 325–354

A cyclostratigraphic interpretation of peritidal to shallow-marine ramp deposits of the early Middle Triassic (Anisian) Opletnya Member exposed in outcrops along the Iskar River gorge, NW Bulgaria, is presented. Based on facies trends and bounding surfaces, depositional sequences of several orders can be identified. New biostratigraphic data provide a time frame of the studied succession with...

Université de Fribourg

The early to middle triassic continental–marine transition of NW Bulgaria: sedimentology, palynology and sequence stratigraphy

Ajdanlijsky, George ; Götz, Annette E. ; Strasser, André

In: Geologica Carpathica, 2018, vol. 69, no. 2, p. 129–148

Sedimentary facies and cycles of the Triassic continental–marine transition of NW Bulgaria are documented in detail from reference sections along the Iskar river gorge between the villages of Tserovo and Opletnya. The depositional environments evolved from anastomosing and meandering river systems in the Petrohan Terrigenous Group to mixed fluvial and tidal settings in the Svidol Formation,...

Université de Fribourg

Barium isotope fractionation in the global barium cycle: First evidence from barium minerals and precipitation experiments

Allmen, Katja von ; Böttcher, Michael E. ; Samankassou, Elias ; Nägler, Thomas F.

In: Chemical Geology, 2010, vol. 277, no. 1-2, p. 70-77

In this study, we present first results from an ongoing investigation on the stable barium (Ba) isotope fractionation in the natural barium cycle. Stable Ba isotope signatures of international IAEA reference materials (synthetic barium sulfate, IAEA-SO-5, -6, and barium carbonate, IAEA-CO-9), natural Ba minerals and experimental Ba precipitates have been analyzed as a first approach to evaluate...

Université de Fribourg

Sedimentary record of arc-continent collision along mesozoic SW north america (Siuna belt, Nicaragua)

Andjić, Goran ; Escuder‐Viruete, Javier ; Baumgartner‐Mora, Claudia ; Baumgartner, Peter O. ; Mitchell, Simon F. ; Caron, Michèle ; Caus, Esmeralda

In: Tectonics, 2019, vol. 38, no. 12, p. 4399–4425

The western margin of the Caribbean Plate is a typical example where oceanic and continental terranes have amalgamated by subduction, collision, and strike‐slip processes. The boundaries between these blocks, as well as their tectonostratigraphic records, are generally covered by younger deposits and dense tropical vegetation, which may hamper reconstructing the accretionary evolution of...

Médiathèque Valais

La collection minéralogique du père Benoît-Joseph Bickel (1900-1986)

Ansermet, Stefan ; Praz, Jean-Claude

In: Vallesia : bulletin annuel de la Bibliothèque et des Archives cantonales du Valais, des Musées de Valère et de la Majorie = Jahrbuch der Walliser Kantonsbibliothek, des Staatsarchivs und der Museen von Valeria und Majoria, 1995, p. LIII-LV

Médiathèque Valais

Les stades de retrait des glaciers du Haut-Valais

Aubert, Denis

In: Bulletin de la Murithienne, 1980, no. 97, p. 101-170

Université de Fribourg

Cave and Karst evolution in the Alps and their relation to paleoclimate and paleotopography

Audra, Philippe ; Bini, Alfredo ; Gabrovšek, Franci ; Häuselmann, Philipp ; Hobléa, Fabien ; Jeannin, Pierre-Yves ; Kunaver, Jurij ; Monbaron, Michel ; Šušteršic, France ; Tognini, Paola ; Trimmel, Hubert ; Wildberger, Andres

In: Acta Carsologica, 2007, vol. 36, no. 1, p. 53-68

Progress in the understanding of cave genesis processes, as well as the intensive research carried out in the Alps during the last decades, permit to summarize the latest knowledge about Alpine caves. The phreatic parts of cave systems develop close to the karst water table, which depends on the spring position, which in turn is generally related to the valley bottom. Thus, caves are directly...