Mass Movement
Mass MovementRock Falls, Avalanches, Soil Creep, Landslides, Mudslides….
Mass Movement
• This is 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____________
Types of Mass Movement
• Slow – Soil Creep (few millimetres a year)• Slow to fast – Bogbursts and Mudflows• Fast - Landslide
Chapter 6: Mass Movement• 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
Soil Creep – the slowest type of Mass Movement
Soil Creep - effects
Soil Creep - effects
Trees and Poles bend, ripples appear on hillsides
Gentle slope: It is greatest near the surface.
3 signs of soil creep are:
_________________________________
_________________________________
_________________________________
Soil Creep: Slow
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.
Bogburst in Galway
Landslide & Avalanche
• Landslides are very rapid, fairly dry movements of regolith
• Avalanches are rapid movements of snow downslope
Rockfall
Rockfall (on Mars)
Talus/Scree
Freshly exposed cliff
Dust Cloud Shows this is dry mass movement
2008 Junior Cert – Short Question
2012 Junior Cert – Short Question
2010 Junior Cert
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