Glaciers Flashcards

1
Q

Glacier

A

Large mass of ice , shaped like river flows very slowly down slopes

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2
Q

Ice sheet

A

Thick layer of ice covers more than 50,000 sq km covers landscape including mountains and valleys

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3
Q

Erosion

A

the wearing away of the land

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4
Q

Weathering

A

when rock/ice is exposed to weather conditions which cause it to change

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5
Q

Plucking

A

Rocks freeze into bottom and sides of glacier as it moves down hill it removes the rocks into the glacier form the ground

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6
Q

Abrasion

A

Glacier moves down rocks frozen to base and sides scrape rockes beneath rocks act like sandpapered and leaves scratches

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7
Q

Freeze-thaw weathering

A

Water freezes in crack and expands, eventually makes rock break

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8
Q

Corrie

A

Deep depression on hill with steep balk wall

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9
Q

Pyramidal peak

A

Sharp edged mountain where 2 or more arêtes meet

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10
Q

Arête

A

Knife edged ridge often formed between two corréis

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11
Q

U shaped valley

A

Wide steep sided valley eroded by glacier

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12
Q

Tarn

A

Depression on hill formed by glacier now full of melt water

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13
Q

Avalanche sheds

A

Covers road protects from avalanche

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14
Q

Where is montroc

A

Small village in chamonix valley

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15
Q

When did the montroc avalanche happen?

A

February 9 1999

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16
Q

Impact of montroc avalanche

A

14 buildings were destroyed and 6 damaged
12 people were killed
Montroc was cut off and only accessible by air
The mayor of Chamonix was found guilty of second degree murder for failing to evacuate
Montoc in advance