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Mass Movement
The document discusses various types of mass movement, including soil creep, bogbursts, mudflows, landslides, and avalanches, which are characterized by their speed and the conditions that trigger them. It explains that mass movement occurs when weathered material moves downslope due to factors like saturation, water, and vegetation. Key attributes and effects of these movements, particularly soil creep and landslides, are highlighted.
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Mass Movement
- 1. Mass Movement Mass Movement RockFalls, Avalanches, Soil Creep, Landslides, Mudslides….
- 2. Mass Movement • Thisis the movement of _______________ downslope under the influence of ________________. • This movement can be fast or slow. • The three things that cause Mass Movement are: – S___________ – W __________ – Shortage of V____________
- 3. Types of MassMovement • Slow – Soil Creep (few millimetres a year) • Slow to fast – Bogbursts and Mudflows • Fast - Landslide
- 4. Chapter 6: MassMovement • Loose material that has been weathered is called ______________. •Under the influence of ________________ this action is known as _________ _______________. •Different types of mass movement are distinguished by their ___________ which depends on the ___________________ of the slope. Type of Mass movement Speed Soil Creep Slow to Rapid Landslide
- 5. Soil Creep –the slowest type of Mass Movement
- 6. Soil Creep -effects
- 7. Soil Creep -effects Trees and Poles bend, ripples appear on hillsides
- 8. Gentle slope: Itis greatest near the surface. 3 signs of soil creep are: _________________________________ _________________________________ _________________________________ Soil Creep: Slow
- 9. Bogbursts and Mudflows •A bog burst occurs when heavy _______ falls on hills covered with layers of P____ or T_____. • Mudflows happen when S________ R________ flows rapidly downslope.
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- 11. Landslide & Avalanche •Landslides are very rapid, fairly dry movements of regolith • Avalanches are rapid movements of snow downslope
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- 13. Rockfall (on Mars) Talus/Scree Freshlyexposed cliff Dust Cloud Shows this is dry mass movement
- 14. 2008 Junior Cert– Short Question
- 15. 2012 Junior Cert– Short Question
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