loose rock

• gravelLoose small rock fragments
• screeLoose rock debris
• rubbleBroken building fragments
• talusAnkle's main bone
• debrisScattered broken fragments

shale · pebbles · boulders · unstable · crumbling · sliding · avalanche · landslide · quarry · erosion · shifting · tumbling · rockfall · mountainside · scramble · footing · treacherous · slate

• rocky terraincliffs, boulders, scree, outcrops, rockfall
• trail hazardsrocks, boulders, ruts, mud, fallen tree
• geohazardslandslides, rockslide, mudslide, mudflow, subsidence
• Mining Hazardscave-in, collapse, explosion, methane, gas explosion
• off-road terrainmud, rocks, boulders, ruts, ditches
• mountain hikingmountain trails, summit trail, ridgeline, trailhead, trail map