Mass Movements

1
Mass Movements

• Weathering and Erosion Unit
• Mrs. Ryan

2

• La Conchita Landslide in California
• On January 10, 2005, an earthflow (landslide) at
  La Conchita destroyed or seriously damaged 36
  homes and killed 10 people.

3
Watch a landslide in progress here

• http//www.compfused.com/directlink/364/

4

• Mudflow on lassen peak may 1915 eruption

5

• A mud flow buried this home. Mudflows can bury
  whole towns in a matter of minutes.

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• Example of slump- when a mass of rock and soil
  suddenly slips down a slope in one large mass,
  giving a scooped out look.

7

• Creep- very slow downhill movement of rock and
  soil

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What is the driving force behind all mass
movement?

• Gravity!