Glacier Landform System

Question 1

Glaciers alter the landscape through which 4 processes?

Answer 1

-erosion
-entrainment
-transportation
-deposition

Question 2

Erosion is the combination of

Answer 2

-abrasion
-plucking
-fracture and traction
-dilation
-meltwater

Question 3

Entrainment

Answer 3

the capturing of material into the glacial ice
Can be supraglacial, subglacial or englacial

Question 4

Transportation

Answer 4

Glacial material carried both horizontally and vertically by the moment of ice itself, but meltwater will also carry material through the complex glacial drainage systems and by glacial deformation

Question 5

Deposition

Answer 5

-Can occur directly as till
-Or released with meltwater as fluvioglacial glacial debris

Question 6

Sub glacial process morphology

Answer 6

-beneath the ice the immense pressure and weight subject the bedrock to grinding, scratching and polishing
-warm based glaciers will undergo fluvial processes due to glacial meltwater

Question 7

Proglacial process morphology

Answer 7

-fluvioglacial processes dominate landscape features at the front of glaciers, caps and ice sheets

Question 8

Paraglacial process morphology

Answer 8

-surface adjusts to glacial retreat through mass movement, and rapid erosion until dynamic equilibrium is achieved

Question 9

Perinatal process morphology

Answer 9

-permafrost features respond to freeze thaw rather than ice movement
-rapid melting can lead to transitional paraglacial features as a new equilibrium is reached

Question 10

Examples of micro scale landforms

Answer 10

-grooves
-chatter marks

Question 11

Examples of meso scale features

Answer 11

-drumlins
-ribbon lakes
-Roche moutonneées

Question 12

Examples of macro scaled features

Answer 12

-pyramidal peaks
-glacial troughs
-cirques/ tarn/ corrie