Junior Cert Geography Slides on Mass Movement - soil creep, landslide, rockfall, mudflows, avalanches etc...

1. Mass Movement
Mass Movement
Rock Falls, Avalanches, Soil Creep, Landslides, Mudslides….

2. 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____________

3. Types of Mass Movement
• Slow – Soil Creep (few millimetres a year)
• Slow to fast – Bogbursts and Mudflows
• Fast - Landslide

4. 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

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: It is 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.

10. Bogburst in Galway

11. Landslide & Avalanche
• Landslides are very rapid, fairly dry
movements of regolith
• Avalanches are rapid movements of snow
downslope

12. Rockfall

13. Rockfall (on Mars)
Talus/Scree
Freshly exposed cliff
Dust Cloud Shows this
is dry mass movement

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15. 2012 Junior Cert – Short Question

16. 2010 Junior Cert