glaciation definitions

Question 1

abrasion

Answer 1

erosion caused by rocks and boulders in the base of the glacier acting like a giant file scratching and scraping the rocks below

Question 2

arête

Answer 2

a sharp, knife-life ridge formed between two carries cutting back by processes of erosion and freeze-thaw

Question 3

bulldozing

Answer 3

ice pushes material of all shapes and sizes as it moves slowly forward

Question 4

conservation

Answer 4

managing the environment in order to preserve, protect or restore it

Question 5

corrie

Answer 5

armchair-shaped hollow in the mountainside formed by glacial erosion, rotational slip and freeze thaw weathering. this is where the valley glacier begins.

Question 6

drumlin

Answer 6

a hill made of glacial till deposited by a moving glacier, usually elongated or oval in shape, with the longer axis parallel to the former direction of ice

Question 7

erratics

Answer 7

rocks which have been transported and deposited by a glacier some distance from their source region

Question 8

freeze thaw weathering

Answer 8

A type of weathering wherewater enters the cracks during the day and freezes overnight. Ice larger than water and therefore causes pieces to fall off

Question 9

glacial trough

Answer 9

A river valley widens and deepened by the erosive actions of glaciers it becomes U-shaped instead of normal V shape of a river Valley

Question 10

hanging valley

Answer 10

A tributary Valley to the main glacier too cold and high up for ice to be able to easily move it therefore was not eroded as much as the lower main valley and today is often the site for waterfall crashing several hundred metres to the mean value

Question 11

land use conflicts

Answer 11

Disagreements which arise when different users of the land do not agree on how it should be used

Question 12

moraine

Answer 12

frost shattered rock Debris and material eroded from the valley floor and sides transported and deposited by glaciers

Question 13

outwash

Answer 13

Material chiefly sand or gravel deposited by melt water streams in front of and underneath a glacier

Question 14

plucking

Answer 14

A type of erosion when meltwater in the glacier freezes onto rocks and as the ice moves forward it plucks or pulls out large pieces along the rock joint

Question 15

pyramidal peak

Answer 15

Where several curries cut back to meet at central point the mountain take the form of the steep pyramid

Question 16

ribbon lake

Answer 16

A long narrow lake found in glaciated valleys formed in locations where the glacier had more erosive power EG in areas of the softer rock where the vally gradient temporarily steepened or it tributaries and glacier joined the main Valley

Question 17

rotational slip

Answer 17

This occurs when the ice moves in a circular motion this process can help to Erode hollows in the landscape and deepen hollows into bowl shapes

Question 18

till

Answer 18

An unsorted mixture of sand clay and boulders carried by a glacier and Deposited as ground moraine over a large area

Question 19

truncated spur

Answer 19

A former river valley spurWhich has been sliced off by a valley glacier forming cliff like edges