rotational earth slide

rotational earth slide
   The mass movement process, associated sediments (rotational earth slide deposit), or resultant landform characterized by an extremely slow to moderately rapid type of slide, composed of comparatively dry and largely unconsolidated earthy material, portions of which remain largely intact and in which movement occurs along a well-defined, concave shear surface and resulting in a backward rotation of the displaced mass; sediments predominantly fine earth (< 2 mm). The landform may be single, successive (repeated up and down slope), or multiple (as the number of slide components increase).
   SW & DV

Glossary of landform and geologic terms. 2013.

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