Geowissenschaftliches Kolloquium
am Fachbereich Umwelt und Biodiversität
Vorträge von Kolleg:innen aus Forschung und Industrie über diverse Themen der Geowissenschaften und fachnaher Themenbereiche mit anschließender Plenardiskussion. Das Kolloquium findet im Sommer- und Wintersemester statt. Jeder ist willkommen!
14 Uhr, 17. März 2026
HS 434, (3. Stock) NLW, Hellbrunnerstraße 34, Salzburg
Accurate dating of Quaternary fluvial archives is critical: spatio-temporal patterns of river incision unfold uplift history of the Variscan Rhenish/Ardenne Massif (N. Europe)
Dr Gilles Rixhon (LIVE, Universität Strasbourg, Frankreich)
Zusammenfassung: The Rhenish/Ardenne Massif (RAM), one of the most emblematic Variscan structures north of the Alps, experienced intraplate uplift during the Plio-Quaternary. However, its causes, geometry, and rates remain debated, largely due to limited chronological control on uplift markers such as fluvial terrace staircases along the Rhine, Moselle, and Meuse rivers. Over the past two decades, cosmogenic nuclide, electron spin resonance, and luminescence dating have provided improved numerical age constraints on key terrace and cave levels.
This presentation provides new age estimates and compiles existing chronological data to infer Plio-Quaternary incision rates across the massif. A consistent regional pattern emerges, with peak incision during the Early to Middle Pleistocene corresponding to a major geomorphological marker. However, a significant time lag (>250–300 ka) is observed between the south-eastern and north-western margins: incision accelerated earlier along the Rhine–Moselle system than along the Meuse. This diachronous pattern supports the hypothesis of a northward-migrating uplift wave and points to regional tectonic forcing, possibly related to stress transfer from the Alps to their foreland.
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