4c.3 sliding on the edge Flashcards
1
Q
Concord ant coastlines
A
has the same type of rock along its length. Concordant coastlines tend to have fewer bays and headlands.
2
Q
Factors of landslides
A
- prolonged rainfall which makes the soil more dense
- buildings which make the slope heavier
- removal of vegitation which removes the roots holding the soil together
Excavation which dust the slope making it more unstable
3
Q
Slope processes
A
Movement of material down slope under the force of gravity, often involving flowing water.
4
Q
Mass movements
A
downslope movement of slope material under influence of gravity only
5
Q
Water erosion
A
downslope movement under the influence of gravity and flowing water
6
Q
Strength of slope
A
Important characteristics in terms of resisting shear stress
7
Q
Concepts of mass movement
A
Mass movement occurs when there is more stress than strength
8
Q
Example of stresses
A
Angle of slope - Rainwater/saturation -Vibration, e.g. car Earthquakes -Sea, cliff erosion
9
Q
Example of strengths
A
- Lubricant layers
- Tree / vegetation
roots - Consolidation of
material
-Porosity of soil
