Failure zones where the flows initiated are visible as white patches where the sandstone was laid bare by failure of overlying soil, colluvium, and regolith. The image below shows the same area as the previous image, with the sandstone cliffs, white talus, and failure zone scar visible. While I typically favor hillshade imagery for viewing slope failure features, slope-shade (inverted black-and-white slope raster) is necessary to appreciate the debris flow features on the northwest flank of North Fork Mountain.