Interactions Between Tectonic Deformation and Erosion During the Seismic Cycle in Mountain Ranges

Philippe Steer (1)

1 GR - Géosciences Rennes

The foundations of modern quantitative geomorphology have thus been built around this paradigm of steady-state landscapes responding to progressive changes in climatic or tectonic condition. In ice-free landscapes, the evolution of continental landforms over large time scales is generally described by a competition between tectonic uplift and erosion of rivers and hillslopes. The initiation of co-seismic landslides is generally attributed to the passage of seismic waves, and in particular to the peak ground acceleration associated with volume waves. The volume of landslides is then generally obtained using empirical scaling laws with their area. Co-seismic landslides have a geomorphological impact that goes beyond the co-seismic phase. The principle of a landscape at a steady state, with a balance between the rates of erosion and uplift, needs to be reconsidered due to the amplitude and variability of tectonic and geomorphological processes during the seismic cycle

Domaines: Géomorphologie

Philippe Steer. Interactions Between Tectonic Deformation and Erosion During the Seismic Cycle in Mountain Ranges. Frédérique Rolandone. The Seismic Cycle: From Observation to Modeling, Wiley, Chap.9, 2022, The Seismic Cycle: From Observation to Modeling, 9781789450385. ⟨10.1002/9781394173709.ch9⟩. ⟨insu-03790124⟩