Landslides

• Landslide – the downward movement of soil, rocks, and earth

  materials along a slope.
• Creep – a slow or gradual movement of soil
• Slump – the downslope flow of soft and unconsolidated materials
• Rock and debris slide– the slow to rapid downslope movement

  of unconsolidated soil and rock debris
• Rockfall – the free falling movement of massive rocks from a cliff

  or steep slopes
• Debris flow – the rapid flow of debris and other rock materials
• Mudflow – characterized by a flowing mass of mud along the flank

  of a volcano
• Sinkholes – geologic formations caused by exposure to water,

  erosion, and ground movement