ROLE OF MASS MOVEMENT

Question 1

Two important mass movement for periglacial environment

Answer 1

Frost creep and solifluction are important mass movement processes acting on slopes in periglacial environments

Question 2

What is Frost Creep

Answer 2

Very slow form of mass movement

material moves downslope by just a few cm per year, even on steeper slopes

Question 3

What is Solifluction

Answer 3

Occurs in permafrost regions

During summer months, active layer melts forming mobile water-saturated layer

Results in formation of either stone-banked or turf-banked lobes on slopes of 10-20*

Question 4

What can Solifluction and Frost Creep form

Answer 4

ASYMMETRIC VALLEYS

Differential rates of solifluction and frost creep lead to one side of valley being significantly steeper than other.

Question 5

ASYMMETRIC VALLEYS example

Answer 5

In northern hemisphere, south-facing slopes are more exposed to Sun (insolation) and thaw more frequently, increasing soil moisture and promoting mass movement, leading to less-steep slope