A landslide that results from the downward sliding of rock debris as a single mass, usually with a backward rotation relative to the slope along which the movement takes place.

The formation of a landslide that develops where strong, resistant rocks overlie weak rocks.

A landslide; the separation of a land or soil mass from a land surface and its movement downslope.

the sliding downslope of a mass of sediment or rock by rotary motion along a concave upwards surface. The process can occur on land to produce landslips or beneath the sea to produce submarine slumps.

Downslope movement in which a mass of regolith detaches from its substrate along a spoon-shaped sliding surface and slips downward semicoherently.

the slow and gradual slippage of all layers of soil so that the bottom of a hillside becomes level with the lowlands or even tipped upward