Membre de la SCNAT

La SGS promeut les sciences géologiques en Suisse. Elle publie le magazine «Swiss Journal of Geosciences» et organise des colloques scientifiques, des réunions de groupes d'intérêt et des excursions thématiques.en plus

Image : Naturmotive, stock-adobe.comen plus


Various excursions are organized by different sections of the SGS. These trips are generally restricted to members of the SGS. If you would like to participate in any of the excursions, kindly register to the SGS.

Swiss Tectonics Studies Group, Field excursion 2022

Relations between the Middle and Upper Penninic nappes (Mont-Fort and Tsaté nappes) between the Val de Bagnes and Mattertal.

Friday 26.08.2022 – Sunday 28.08.2022

Lead: Adrien Pantet and Jean-Luc Epard

Meeting point: Friday 26.08.2022, Martigny station, 09h00

End of Field trip: Sunday 28.08.2022, Sion station, around 18h00

Limited to 24 persons. Transportation in the field will be provided by minibuses (UNIL).

Program: In the Western Swiss Alps of Valais, some series close to the boundary between the Middle and Upper Penninics raise problems regarding their tectonic and paleogeographic attribution. These include the series of Mesozoic rocks originally associated to a continental basement that constitute the "Faisceau Vermiculaire" of Argand, the “Cimes-Blanches” nappe or the Frilihorn series. Their relationship with the "Schistes Lustrés" of the Tsaté nappe is also problematic. New data collected between the Val de Bagnes and Zermatt allow to revise some tectonic and paleogeographic attributions and to present a new tectonic model for the area.

Day 1: Val de Bagnes, Mauvoisin. Evolène series (Mont-Fort) and Tsaté nappe

Day 2: Val d’Hérens, Evolène area.

Day 3: Täschtal: Alphubel anticline and its sedimentary cover. Relations between folds associated to nappe emplacement and the early Mischabels backfold.

Follow the link below for more information.

STSG Excursion 2021 to the Aar Massif

The Swiss Tectonic Studies Group excursion visited the Aar Massif from 27-29 August, 2021.

The excursion was led by Lukas Nibourel, Marco Herwegh and Alfons Berger. Lukas Nibourel completed his PhD in Geology at the University of Bern in 2019. He studied the structural and thermo-kinematic evolution of the eastern Aar Massif in the Swiss Central Alps, and now works at the Georesources Switzerland Group at the Department of Earth Sciences, ETH Zürich.

The participants visited spectacular outcrops, mostly along the basement-cover contact, to discuss the structural and thermo-kinematic evolution of the eastern Aar Massif. The massif's deformation and exhumation history was reconstructed based on field observations and low-T thermochronological data. The influence of inherited normal faults on the distribution and geometry of Alpine compressional fault zones was another important topic.

The excursion guide is available on request at .

Err detachment
Err detachment

Excursion photos

  • Bösentrift - Täsch valley
  • Mont Rouge - Hérens valley
  • Panorama Täsch valley
  • Polymict Breccia -  Bagnes valley
  • Polymict breccia - Evolène Series
  • Sasseneire - Hérens valley
  • Sattelspitz - Täsch valley
  • Bösentrift - Täsch valleyImage : Adrien Pantet1/7
  • Mont Rouge - Hérens valleyImage : Adrien Pantet2/7
  • Panorama Täsch valleyImage : Adrien Pantet3/7
  • Polymict Breccia - Bagnes valleyImage : Adrien Pantet4/7
  • Polymict breccia - Evolène SeriesImage : Adrien Pantet5/7
  • Sasseneire - Hérens valleyImage : Adrien Pantet6/7
  • Sattelspitz - Täsch valleyImage : Adrien Pantet7/7