Kamis, 16 Juni 2011

DEFINITION OF ROCKSLIDES AND DEBRIS SLIDES

Rockslides is the term given to the sudden downslope movement

of newly detached masses of bedrock (or debris slides, if

the rocks are mixed with other material or regolith). These

are common in glaciated mountains with steep slopes and

also in places where there are planes of weakness, such as

bedding planes, or fracture planes that dip in the direction of

the slope. Like rockfalls, rockslides may form fields of huge

boulders coming off mountain slopes. The movement to this

talus slope is by falling, rolling, and sliding, and the steepest

angle at which the debris remains stable is known as the

angle of repose. The angle of repose is typically 33°–37° for

most rocks.

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