Mass Movement (AQA A-Level Geography): Flashcards

Downslope movement of material under gravity

Cohesion, slope angle, grain size, water/temp levels

Heavy rainfall lubricates material causing internal failure

Undercutting by waves or mechanical weathering (frost action)

Rapid flows of fine material down slope from heavy rainfall

Soft material on resistant layers moves down curved slide plane

Very slow, continuous downslope movement of soil particles

Mudflows on gentler slopes creating lobe-shaped features

East Yorkshire and north Norfolk coasts

Adds water, increases saturation, reduces slope stability