Fig. 13

Upper panel: histogram of the number of boulders as a function of the gravitational slope of the terrain on which they stand. Lower panel: gravitational slope of the terrain on which boulders stand as a function of their size.
This figure is made of several images, please see below:
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.