Volcanoes	Earthquakes	Tidal Waves	Floods and Flash Floods	Avalanches, Rockfalls, and Mudslides
Quicksand	-	-	-	WSG

AVALANCHES, ROCKFALLS, AND MUDSLIDES

    Whenever a mass of solid matter falls || moves down a slope,
the phenomenon is described by one of these three terms. Technically,
an avalanche can contain any solid material, or a mixture
of several types (snow, ice, rocks, earth); however, in these rules,
the term refers specifically to a mass of snow or ice that cascades
down a mountainside or over a precipice. A rockfall occurs when
a mass of earth or rocks, or both, is in motion down a slope or
over a cliff. In a mudslide, the moving material is a mixture of
earth and water that flows down a slope at a relatively slow
speed.