Geomorphic response to the Lateglacial-Holocene transition in high Alpine regions (Sanetsch Pass, Swiss Alps)
Résumé
Geomorphic response to the Lateglacial-Holocene transition in high Alpine regions (Sanetsch Pass, Swiss Alps) 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 been only punctually investigated. In this study, we propose a detailed reconstruction of post-Last Glacial Maximum palaeo-environmental conditions and geomorphic connectivity in the Sanetsch Pass area (2252 m a.s.l., western Swiss Alps), based on a multi-method approach combining geomorphological and sedimentological field investigations with quantitative sedimentology and geochronology. Samples for sediment characterization (grain-size, micromorphology and X-Ray diffraction) and geochronology (optically stimulated luminescence and 10 Be surface exposure dating) were collected from three representative landforms of the study area: a high-elevation silty deposit covered by patterned ground, an alluvial fan and a hummocky moraine covered by rockfall deposits. Our multi-method outcomes reveal the geomorphic history of the three deposits and
Domaines
Sciences de l'environnement
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