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Erosion and Mass Movements

Erosion and Mass Movements. Notes in Notebook or on Looseleaf. Erosion. 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. Triggers of Mass Movements. Mass Movements.

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Erosion and Mass Movements

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  1. Erosion and Mass Movements Notes in Notebook or on Looseleaf

  2. Erosion • 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

  3. Triggers of 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 .

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

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

  6. Heavy Rains Can Trigger Slumps

  7. Types of Mass Movements Mass Movements • Flows include: • Avalanches • Mudflows • Landslides •Mudflows

  8. 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

  9. Videos • Watch both videos-Jot down 3 notes total • Landslides: https://www.youtube.com/watch?v=mknStAMia0Q • Avalanches: • https://www.youtube.com/watch?v=wcr1Sl-T9S0

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