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Geography 12: Weathering And Erosion > Mass Wasting > Flashcards

Flashcards in Mass Wasting Deck (9)
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1

Mass wasting

Downhill movement of weathered rock particles, soil by gravity.
(Sudden/violent/gradual)

2

Causes of mass wasting

Natural or man made causes make slopes unstable
Water seeps into soil, soil gets heavy and expands
Freezing/thawing=contract/expand

3

Types of mass wasting

Scree/Talus
Soil creep
Landslide
Mud and debris flow
Slump
Rockfalls and avalanches
Solifluction

4

Scree/Talus

Steep rocky slope
Water enters cracks in rock and freezes
Rock breaks apart and falls down

5

Soil creep

Imperceptible creep of soil downslope
Leaning trees, fences, etc.

6

Landslide

Rapid movement of soil downslope
Rock is weathered into soil (vegetation)

7

Mud and debris flow

Soil flows downhill like liquid
Sandy soils are prone
Highway 3A east of Keremeos

8

Slump

Slab of land breaks away, top layer of soil vegetation remains intact.

9

Rockfalls/avalanches

Mass of snow/ice that breaks away and slides down mountain slope.