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Erosion and Mass Movements. Erosion Erosion causes the wearing away and lowering of Earth’s land and surface features as it transports material away Erosion.

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Presentation on theme: "Erosion and Mass Movements. Erosion Erosion causes the wearing away and lowering of Earth’s land and surface features as it transports material away Erosion."— Presentation transcript:

1 Erosion and Mass Movements

2 Erosion Erosion causes the wearing away and lowering of Earth’s land and surface features as it transports material away Erosion causes the wearing away and lowering of Earth’s land and surface features as it transports material away The sun fuels the water cycle and the forces of erosion The sun fuels the water cycle and the forces of erosion

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5 Triggers of Mass Movements Mass Movements Mass Movements  Mass Movement: The transfer of rock and soil downslope due to gravity Factors that trigger mass movements: Water-saturated Surface Over-steepening of Slopes Lack of Vegetation Earthquakes.

6 Types of Mass Movements Mass Movements  Mass movements are classified on the kind of material that moves, how it moves, and the speed of movement.  Rockfalls/Debris Fall: When rocks or rock fragments fall freely through the air.

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8 Types of Mass Movements Mass Movements Speed: 1 mm/ day to 1 km/hr  Debris Flow: In a debris flow, a block of material moves suddenly along a flat, inclined surface

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11 Heavy Rains Can Trigger Slumps

12 Types of Mass Movements Mass Movements Mudflows  Flows include:  Avalanches  Mudflows  Landslides

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14 Types of Mass Movements Mass Movements  Creep: the slow, downhill movement of soil  Soil Creep moves more material per year than any other mass movement- even though it is slow, it is constantly happening *Creep can cause: Cracked roads, leaning utility poles, and bent trees

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