Ice on the Land

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Corrie
deep, circular hollow at top of mountain, formed by glacial erosion e.g. Stickle Tarn, Lake District
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Glacial Period
a period of ice advance associated with falling temperatures
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Ablation
the melting of ice
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Rotational Slip
sliding of ice along curved surfaces
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Glacier
a mass of ice flowing downhill
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Snout
the end of a glacier
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Accumulation
the adding of snow into a glacier
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Internal deformation
where ice moves by cracking and breaking
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Basal slide
where melted water lubricates the ice so it slides downhill
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Interglacial
a period of ice retreat associated with rising temperatures
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Ice sheet
large body of ice over 50,000km squared in extent
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Ice cap
smaller body of ice usually found in mountainous regions
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Glacier budget
how the mass of ice in a glacier changes
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Medial Moraine
material from the sides of two glaciers merge and are carried down the middle where they meet
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Plucking
when ice freezes to rocks and then as the glacier moves they get pulled out
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Terminal Moraine
material builds up at the end of a glacier
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Lateral Moraine
material builds up at the side of glaciers
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Ground Moraine
material is dragged along the bottom of the glacier, spread across the valley floor
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Lodgement
material deposited by overloaded ice
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Bulldozing
the passing of deposited sediment at the snout by the glacier as it advances
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Abrasion
when rocks under the glacier scrape away the land beneath (sandpaper action)
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Arete
narrow, steep-sided ridge between two corries e.g. Striding Edge, Lake District
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Pyramidal Peak
sharp, pointed mountain summit e.g. Mount Snowdon, Wales
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Freeze-thaw Weathering
water freezes in cracks, then expands and fractures the rock
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Ice Age
a period of long-term cooling of the Earth's atmosphere, resulting in an expansion of ice sheets and glaciers
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Pleistocene
most recent ice age, began 2 millions years ago
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Debris
loose rock is transported on the sides, surface and within a glacier
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Avalanche
rapid flow of snow down a slope
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Glacial Trough
wide, deep U-shaped valley e.g. Great Langdale Valley, Lake District
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Drumlins
long, narrow, egg-shaped hills formed from glacial till e.g. Great Langdale Valley, Lake District
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Other cards in this set

Card 2

Front

a period of ice advance associated with falling temperatures

Back

Glacial Period

Card 3

Front

the melting of ice

Back

Preview of the back of card 3

Card 4

Front

sliding of ice along curved surfaces

Back

Preview of the back of card 4

Card 5

Front

a mass of ice flowing downhill

Back

Preview of the back of card 5
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