glacial Flashcards

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1
Q

how much of the uk was covered in ice 20,000 years ago

A

Scotland, Ireland and Wales, as far south as the Bristol Channel

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2
Q

freeze-the weathering

A

water gets into the cracks in the rocks. The water freezes and expands putting pressure on the rock. The ice then thaws, releasing the pressure, this will weaken the rock, making it vulnerable

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3
Q

abrasion

A

bits of rock stuck in the ice grind against the rock below the glacier wearing it away

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4
Q

plucking

A

meltwater at the base, back or sides of a glacier freezes onto rock. As the glacier moves forward it pulls out pieces of rock

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5
Q

rotational slip

A

the ice at the top of the glacier moves in a circular motion. this can erode hollows in the landscape and deepen them into bowl shapes

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6
Q

bulldozing

A

when glaciers push loose material ahead of them, it is called bulldozing

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7
Q

what is the material that glaciers move called

A

till

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8
Q

landforms formed by erosion - 7

A

-corries
-aretes
-pyramidal peaks
-truncated spurs
-glacial troughs
-ribbon lakes
-hanging valleys

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9
Q

arete formation

A

narrow, steep-sided ridge formed when 2 glaciers flow in parallel valleys. The glaciers erode the sides of the valleys, sharpening the ridge between them

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10
Q

corries formation

A

start as hollows containing a small glacier. As rotational slip occurs, the hole is eroded into a steep-sided armchair shape with a lip at the bottom. When the ice melts, it leaves a tarn

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11
Q

pyramidal peak formation

A

pointed mountain peak with t least 3 sides. It’s formed when 3 or more back-to-back glaciers erode a mountain

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12
Q

truncated spurs formation

A

cliff-like edges on the valley side formed when ridges of land that stick out into the main valley are cut off as the glacier moves past

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13
Q

formation of glacial troughs

A

steep sided valleys with flat floors. they start off as a v-shaped river valley but change to a u-shape as the glacier erodes the sides and floor making it deeper and wider

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14
Q

formation of ribbon lakes

A

long, thin lakes that form after a glacier retreats. They form in hollows where softer rock was eroded more than the surrounding hard rock

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15
Q

formation of hanging valleys

A

valleys formed by small tributary glaciers that flow into a main glacier. the glacial trough of the large glacier is eroded much more deeply, so when all of the glaciers melt, the tributary valleys are at a higher level

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16
Q

landforms formed by transportation and deposition

A

-moraines
-drumlins
-erratics

17
Q

different types of moraines

A

-lateral
-ground
-medial
-terminal

18
Q

drumlins

A

-elongated hills
-overloaded or melting glaciers deposit material, this material builds up forming hills

19
Q

erratics

A

rocks that have been picked up by a glacier, carried along and dropped in an area that has a different rock type

20
Q

economic activities in glaciated upland areas - 4

A

-tourism, attractive tourist hotspots
-farming, sheep
-forestry, building materials
-quarrying, rock exposed, easy to access

21
Q

why does the lake district attract tourists

A

-beautiful scenery
-cultural attractions
-activities

22
Q

environmental impacts of tourism in the Lake District

A

-footpath erosion
-damaged vegetation from cars
-noise, erosion and water pollution

23
Q

economic impacts of tourism in the Lake District

A

-provided 18,000 jobs in 2017
-made £1.5 bill in a year
-local people can’t afford to stay living In the area

24
Q

social impacts of tourism in the Lake District

A

-heavy traffic
-businesses cater for tourists not locals

25
Q

negative impacts of tourism in the Lake District - 5

A

-traffic and parking
-footpath erosion
-littering
-water/noise pollution
-house prices

26
Q

management strategies - traffic and parking

A

people encouraged to use bikes, buses, boats and trains

27
Q

management strategies - footpath erosion

A

paths resurfaced using hard-wearing materials

28
Q

management strategies - littering

A

signs put up and covered bins provided

29
Q

management strategies - water/noise pollution

A

speed limits and zoning schemes

30
Q

management strategies - house prices

A

affordable housing and local occupancy schemes help locals to stay in the area an prevent people buying a second/holiday home