rocks and soil to move downslope. If the • slope on which material rests is greater than the angle of repose, mass movement will occur. Four types • of rapid mass movement are rock falls, landslides, mudflows, and lahars. Water, • plant roots, and burrowing animals can cause creep.
rocks and soil to move downslope. • If the slope on which material rests is greater than the angle of repose, mass movement will occur. • Four types of rapid mass movement are rock falls, landslides, mudflows, and lahars. • Water, plant roots, and burrowing animals can cause creep.