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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

Describe the principal differences between (a) a rockslide and a rockfall, and (b) a slump and a debris flow.

(a)

To determine

The main differences between rockslide and rock fall.

Explanation

Falls are fast downward movement of the Earth materials freely through the air. Most common type of fall is rockfall. The fall of rocks occurs from steep bedrock cliffs either one by one following the weakening of bonds between individual clasts and the rest of the cliff by weathering or as a huge mass rock fall from a cliff face or an overhanging ledge. Usually, the huge falling slabs are broken into angular individual clasts when they hit the ground at the cliff base.

The type of movement in which the cohesive or semi-cohesive units of the Earth materials slip downslope in continuous contact with the surface is known as slides. Compared to falls, the role of water in slide is more. It occurs more prominently in areas that are characterized by a considerable slope with tilting layers of alternating strong and weak rocks.

The type of slides that contains huge bedrock mass is known as rockslides...

(b)

To determine

The main differences between a slump and a debris flow.

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