Periglacial processes Flashcards
1
Q
The processes that occur in periglacial climates are highly dependant on what?
A
The processes that occur in periglacial climates are highly dependant on cycles of freezing and thawing, which give rise to a very distinctive geomorphology.
2
Q
What are the dominant periglacial processes associated with?
A
The dominant periglacial processes are associated with permafrost and the thawing and movement of the active layer.
3
Q
State some of the periglacial processes?
A
- The contraction and cracking of rapidly freezing soils
- The migration of surface water to the ‘freezing front’
- The mass movement of the active layer downslope
4
Q
Give some processes which are also responsible for the formation of periglacial landforms but are not confined to periglacial environments?
A
- Frost shattering
- Fluvial action
- The action of wind
5
Q
Give some processes that are unique to periglacial environments?
A
- The development of thermal contraction cracks
- The formation of permafrost and frost heave