In the study of coastal landscapes in the UK, such as the Holderness Coast, mass movement is a key geomorphological process. Which of the following best describes the process of rotational slumping?
The slow, continuous downslope migration of soil particles under gravity, accelerated by wetting and drying cycles, causing fence posts and trees to tilt downslope.
The sudden detachment of individual jointed rock fragments from a vertical cliff face under gravity, accumulating as a scree slope at the base.
The rapid downslope movement of saturated cohesive clay or unconsolidated material along a curved failure surface, resulting in a crescent-shaped scar and stepped terraces.
The downslope movement of a highly liquefied mixture of water, soil, and rock fragments, behaving like a viscous fluid without a defined slip plane.
