A debris cone is a conical accumulation of rock fragments, soil, and other debris that has been transported downslope by gravity, water, or ice. These cones often form at the base of cliffs, slopes, or glaciers and are important for understanding mass-wasting processes, sediment transport, and the geomorphology of mountainous regions.
Reference: Whalley, W. B., & Azizi, F. (2003). “Rock Glaciers and Protalus Forms: Analogous Forms and Equifinal Processes?” Geografiska Annaler: Series A, Physical Geography, 85(3-4), 237-249.