The three-stage rock failure dynamics of the Drus (Mont Blanc massif, France) since the June 2005 large event.

ABSTRACT: Since the end of the Little Ice Age, the west face of the Drus (Mont Blanc massif, France) has been affected by a retrogressive erosion dynamic marked by large rockfall events. From the 1950s onwards, the rock failure frequency gradually increased until the large rockfall event (292,680 m³) of June 2005, which made the Bonatti Pillar disappear. Aiming to characterize the rock failure activity following this major event, which may be related to permafrost warming, the granitic rock face was scanned each autumn between October 2005 and September 2016 using medium- and long-range terrestrial laser scanners. All the point clouds were successively compared to establish a rockfall source inventory and determine a volume-frequency relationship. Eleven years of monitoring revealed a pha

SUBMITTER: Guerin A 

PROVIDER: S-EPMC7567073 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature