Mass Movements, Wind, and Glaciers

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Mass Movements, Wind, and Glaciers

• Chapter 8

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Mass Movements
weight

• The addition of ______ (most commonly, added
  water) combined with an unstable _____ creates
  mass movements as _______ acts to move the mass
  downslope.
• These processes can be gradual (such as _____) or
  immediate (such as landslides, mudflows, slump,
  and rockfalls).

slope
gravity
creep
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_____ sudden downslope movement along a ______
surface
Slump
curved
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Mass Movements Result of Gravity
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Wind Erosion

• Wind can create deposits such as _____ (sand size
  particles) or _____ (silt size partlicles)
• There are ____ types of dunes shown on the next
  slide. The main differences are the _____ (either
  crescent or ridge and valley) and the direction
  the prevailing winds blow.

dunes
loess
four
shape
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windward
________ side (side facing into the wind) is less
steep and _______ side is steeper.
leeward
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barchan
transverse
parabolic
longitudinal
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Glacial Deposition
Till

• ____ Unsorted (small and large particles
  together) deposit formed by glacial ice
• _______ Sorted stream deposit from a glaciers
  meltwaters

Outwash
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Glacial Erosion
Glaciers erode the surface to create landforms
such as U-shaped valleys, horns, aretes, hanging
valleys, and _______.
cirques
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Glacial Landforms

• The following slides show present glaciers in
  Montana, Washington, and the Alps.

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Swiss Alps, Interlocken Area
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Glacial Lakes in the Swiss Alps
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Hut in the Austrian Alps
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Mountain Goat, Glacier National Park, Montana
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Glacier National Park, Montana
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Glacier National Park, Montana
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Bighorn Sheep at Glacier National Park
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Glacier National Park, Montana
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Going-to-the-Sun Road, Glacier National Park
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Horn
Cirque
Glacier National Park, Montana
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Glacier National Park
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North Cascades National Park
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North Cascades National Park
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Northern Cascades National Park, Washington
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Nisqually Glacier at Mount Rainier
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Mount Rainier
U-Shaped Valley
Moraine
Snout
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Crevasses
Nisqually Glacier, Mt Rainier
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Nisqually Glacier River Valley, Mount
Rainer
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Glaciers Review
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