Fig. 2

Hillshade of the digital elevation model (DEM, 2 m resolution) of the Chironico landslide (for location see Fig. 1). The Chironico landslide is seen in the centre, forming a blockage of the river valley, whereas the detachment scarp is located on the eastern valley flank. S5 shows the location of the borehole in which the wood pieces were found in lacustrine sediments. DEM model reproduced with the authorization of the Ufficio della misurazione ufficiale e della geoinformazione (UMG) of the canton of Ticino, dated 1.7.2011. Coordinates of the Swiss national grid CH1903 (LV03)