Gravity

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Gravitys Effect on Erosion 2/5/15

• 12-4 pgs. 316-319
• IN How does glaciation change the appearance of
  mountains?

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Terms to Learn Objectives

• Terms
• mass movement rock fall landslide creep
• mudflow
• Objectives
• Explain how slope is related to mass movement.
• State how gravity affects mass movement.
• Describe different types of mass movements.

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How does gravity effect erosion?

• Mass Movement the movement of any material,
  such as rock, soil, or snow, downslope.

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• Mass movement is controlled by the force of
  gravity and can occur rapidly or slowly.

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Angle of Repose

• The angle of repose is the steepest angle, or
  slope, at which loose material will not slide
  downslope.

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Rapid Mass Movement

• Rock Fall a group of loose rocks that fall down
  a steep slope.

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Rapid Mass Movement

• Landslide a sudden and rapid movement of a
  large amount of material downslope.

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Rapid Mass Movement

• Slump when a block of material moves downslope .

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• Mudflow the rapid movement of a large mass of
  mud/rock and soil mixed with a large amount of
  water that flows downhill.

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Rapid Mass Movement

• Lahars mudflows of volcanic origin.

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Slow Mass Movement

• Creep the extremely slow movement of material
  downslope.

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• OUT What factors increase the potential for mass
  movement?