A form of mass movement (also called a single rotational slide) where rock and soil rotate backwards with movement down a concave face: ‘a more or less rotational movement, about an axis that is parallel to the slope contours, involving shear displacement along a concavely up-ward facing failure surface’ (D. Varnes1978). Slumps are most common in thick regoliths (Nwadije (1998) Nat. Hazards 1, 2) and large mudstone rock units (Plint (1986) Sedimentol. 33, 3).
Subjects: Earth Sciences and Geography — Environmental Science.