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 Landslides  Mudslides/Mudflows  Rockslides  Creep  Slump SINKHOLES COASTAL EROSION.

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Presentation on theme: " Landslides  Mudslides/Mudflows  Rockslides  Creep  Slump SINKHOLES COASTAL EROSION."— Presentation transcript:

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2  Landslides  Mudslides/Mudflows  Rockslides  Creep  Slump SINKHOLES COASTAL EROSION

3 Mass Wasting/Mass Movement The process by which soil and rock move down-slope.

4 Erosion; the process by which natural forces move weathered rock & soil from one place to another. Gravity

5 The material moved by erosion is called SEDIMENT. This may include pieces of rock or soil.

6 Mass movement happens when gravity moves sediment downhill. Mass movement can be rapid or slow and is caused by gravity.

7 Landslides are the most destructive of the four types of mass movement. Landslides happen when rock & soil slides quickly down steep slopes.

8 This is a picture of a landslide. A type of mass wasting.

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13 Mudflows are very dangerous. Mudflows occur when water (as much as 60% of the flow), rock & soil moves rapidly downhill

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17  Rockslides are caused when rocks become loose and are pulled down by gravity. Rocks may become loose by the agents of erosion such as wind and water.

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21 Creep is very slow movement. Creep is often barely noticeable, you may eventually see the effects of the slow movement in telephone poles, fence posts & trees leaning at odd angles

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26 This is a diagram of creep. The hillside slowly slips over many years from water and gravity.

27 Slump occurs when one huge mass falls together. Occurs when a mass of rock & soil suddenly slip down a slope in one huge mass Slump happened when water soaks the bottom of soil rich in clay

28 In this picture the land has slumped into the road below.

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31  An avalanche is the same as a landslide but it is made of snow and ice.

32 This is a picture of an avalanche. It is similar to a landslide with ice and snow instead of rock.

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36 Other problems associated with erosion; Sink holes Coastal Erosion

37  United Streaming Clip

38 p4/Cave%20Formation.htm

39  United Streaming - Deposition

40 Deposition

41 As the slightly acidic rain water passes through rock, it dissolves away calcite and enlarges cave passages. Cave formations grow as the calcite is deposited.

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67 Water slowly seeps into limestone and drips

68 Flowstone indicates a steady source of water over a long time period.

69  Forms when limestone dissolves and the roof or top of the cave collapses.

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