Discussion on “Large landslides associated with a diapiric fold in Canelles reservoir (Spanish Pyrenees): Detailed geological–geomorphological mapping, trenching and electrical resistivity imaging” by Gutiérrez et al. (2015)

•Detailed stratigraphic record in a large landslide area in a series of sediments from late Cretaceous•Discussion on conditions leading to accelerated catastrophic motion•Outline of basic physics and kinematic conditions leading to fast accelerated landsliding

This discussion a) reviews the geological model adopted for the landslide analysis and argues that there is nothing new in the reference paper, b) examines the conditions for fast catastrophic sliding and demonstrates that conditions for such a phenomenon may be present in the case of Canelles slide, against the opinion of the authors, and c) justifies the corrective measures adopted to stabilize the landslide.