Types Of Glaciers Flashcards

0
Q

How big is a ice sheet

A

50000 km3<

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1
Q

8 types of glaciers

A
Ice sheets 
I've caps 
Ice field
Valley glacier 
Corrie glacier 
Piedmont glacier
Niche glaciers 
Ice shelves
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2
Q

Example of ice sheets?

A

Antartica and Greenland

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3
Q

What shape is a ice cap?

A

Huge dome-shape

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4
Q

Where do ice caps develop?

A

High plateaus

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5
Q

What size are ice caps

A

<50000km3

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6
Q

What is a ice field?

A

Where much of an upland region is covered by glacial ice, just the taller peaks exposed (nunataks)

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7
Q

What is a valley glacier?

A

Larger masses of ice that flow from ice ice fields or corgis and usually follow preglacial river valleys

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8
Q

What do valley glaciers form

A

Developing steep sides as they erode their course

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9
Q

What are cirque glaciers?

A

Small ice masses on mountain slopes which gradually erode armchair shaped hollows.

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10
Q

What happens if a cirque glacier gets to large?

A

They spill over the lip to feed a valley glacier

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11
Q

What direction do cirque glaciers face?

A

N NE

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12
Q

What size ares do Corrie glacier face?

A

0.5 to 10 km2

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13
Q

What is a piedmont glacier

A

Large lobes of ice formed when glaciers spread out on reaching lowland areas and escaping the confines of the valley

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14
Q

How thick is the Antarctic ice sheet

A

Attains thickness of 4000m

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15
Q

What a ice shelve?

A

Extensions of ice sheets reaching out over the sea.

16
Q

How thick can an ice sheet be?

17
Q

Example of temperate glacier?

A

Atchabasca Canada

18
Q

Example of polar glacier?

A

Merserve glacier Antarctica

19
Q

Where are cold glaciers found? Example

A

Arctic and Antarctica

20
Q

Where are temperate glaciers found? Examples?

A

Alps and Rockies

21
Q

Where are cold glaciers found?

A

High latitude

Low relief

22
Q

What are temp in cold glacier?

A

Throughout below 0

23
Q

What are basal temps in cold glacier?

A

Below pmp, frozen to bed

24
What happens in a cold glacier due to ice being frozen to bedrock?
Little ice movement Little erosion Little friction
25
How much does a cold glacier move per day?
1-2cm
26
What are the mechanism for movement in a cold glacier?
Internal deformation
27
What is there limited in a cold glacier?
Ablation and accumulation
28
Where are temperate glaciers found
High altitude
29
What features are common in temperate glaciers
Fluvial glacial features
30
What is the relief like in a temperate glacier
Steep
31
What is the base temp in temperate glacier?
0 at or below pmp
32
How much does temperate glacier Move per day?
2-3 m
33
How much does a temperate glacier move per year?
20-200m
34
Which type of glacier a more powerful erosive agent
Temperate
35
How much does a cold glacier move per year?
3-4 m (Merserve glacier Antarctica)
36
Movement in temperate glacier?
Basal slippage