Types Of Glaciers Flashcards
How big is a ice sheet
50000 km3<
8 types of glaciers
Ice sheets I've caps Ice field Valley glacier Corrie glacier Piedmont glacier Niche glaciers Ice shelves
Example of ice sheets?
Antartica and Greenland
What shape is a ice cap?
Huge dome-shape
Where do ice caps develop?
High plateaus
What size are ice caps
<50000km3
What is a ice field?
Where much of an upland region is covered by glacial ice, just the taller peaks exposed (nunataks)
What is a valley glacier?
Larger masses of ice that flow from ice ice fields or corgis and usually follow preglacial river valleys
What do valley glaciers form
Developing steep sides as they erode their course
What are cirque glaciers?
Small ice masses on mountain slopes which gradually erode armchair shaped hollows.
What happens if a cirque glacier gets to large?
They spill over the lip to feed a valley glacier
What direction do cirque glaciers face?
N NE
What size ares do Corrie glacier face?
0.5 to 10 km2
What is a piedmont glacier
Large lobes of ice formed when glaciers spread out on reaching lowland areas and escaping the confines of the valley
How thick is the Antarctic ice sheet
Attains thickness of 4000m
What a ice shelve?
Extensions of ice sheets reaching out over the sea.
How thick can an ice sheet be?
1000m
Example of temperate glacier?
Atchabasca Canada
Example of polar glacier?
Merserve glacier Antarctica
Where are cold glaciers found? Example
Arctic and Antarctica
Where are temperate glaciers found? Examples?
Alps and Rockies
Where are cold glaciers found?
High latitude
Low relief
What are temp in cold glacier?
Throughout below 0
What are basal temps in cold glacier?
Below pmp, frozen to bed
What happens in a cold glacier due to ice being frozen to bedrock?
Little ice movement
Little erosion
Little friction
How much does a cold glacier move per day?
1-2cm
What are the mechanism for movement in a cold glacier?
Internal deformation
What is there limited in a cold glacier?
Ablation and accumulation
Where are temperate glaciers found
High altitude
What features are common in temperate glaciers
Fluvial glacial features
What is the relief like in a temperate glacier
Steep
What is the base temp in temperate glacier?
0 at or below pmp
How much does temperate glacier Move per day?
2-3 m
How much does a temperate glacier move per year?
20-200m
Which type of glacier a more powerful erosive agent
Temperate
How much does a cold glacier move per year?
3-4 m (Merserve glacier Antarctica)
Movement in temperate glacier?
Basal slippage
