Landforms produced by glacial erosion
Corries or cirques - form in hollows where snow accumulates This video below shows how corries are formed. They are also known as cirques due to their circular nature
To the right is a picture of Grisendale tarn, a corrie in the lake district in the UK which is a large tourist attraction. The tarn has developed as a result of glacial erosion and the process of this is addresses in the video clip below.
This is a map below of where in the UK Grisendale Tarn is found. Glacial landforms are even in the UK and not just in cold countries!
To the right is a picture of Grisendale tarn, a corrie in the lake district in the UK which is a large tourist attraction. The tarn has developed as a result of glacial erosion and the process of this is addresses in the video clip below.
This is a map below of where in the UK Grisendale Tarn is found. Glacial landforms are even in the UK and not just in cold countries!
U shaped valleys
A U shaped valley is a form of mountain which starts as a V shaped valley. Corries change the landscapes of the valleys through erosion to the v shaped valley. The glaciers change the valley shape into a U by developing a steep sided wide valley in the shape of a letter U, They are formed by a valley glacier which moved down the valley due to gravitational force.
As the glacier moves down the valley it plucks the rock from underneath the rocks and rubs against the bed of the valley due to the extent of compaction. This causes erosion and deepens and widens the valley. This at the front of the glacier acts like a bulldozer, shifting and removing soil and plucking rock from interlocking spurs and truncating them. As a river erodes the upper valley cuts down into the rock and meanders in and out of the surrounding rock. Throughout glaciation the rock is taken away by descending ice sheets
Where PMP is exceeded the glacier basally slides encouraging more erosion. Different erosion occurs as different types of compressing and extending flows. This can develop ribbon lakes which are often present in U shaped valleys. These are long and thin lakes (like a ribbon) which collect the melt water and rain after the glacier has melted. Below is a video clip to explain how U shaped valleys are formed from V shaped valleys
A U shaped valley is a form of mountain which starts as a V shaped valley. Corries change the landscapes of the valleys through erosion to the v shaped valley. The glaciers change the valley shape into a U by developing a steep sided wide valley in the shape of a letter U, They are formed by a valley glacier which moved down the valley due to gravitational force.
As the glacier moves down the valley it plucks the rock from underneath the rocks and rubs against the bed of the valley due to the extent of compaction. This causes erosion and deepens and widens the valley. This at the front of the glacier acts like a bulldozer, shifting and removing soil and plucking rock from interlocking spurs and truncating them. As a river erodes the upper valley cuts down into the rock and meanders in and out of the surrounding rock. Throughout glaciation the rock is taken away by descending ice sheets
Where PMP is exceeded the glacier basally slides encouraging more erosion. Different erosion occurs as different types of compressing and extending flows. This can develop ribbon lakes which are often present in U shaped valleys. These are long and thin lakes (like a ribbon) which collect the melt water and rain after the glacier has melted. Below is a video clip to explain how U shaped valleys are formed from V shaped valleys
Striations
Striations are a result of glacial erosion. When the glacial trough erodes down to sea level or below often the ice can retreat and a Fjord can be developed. Striations are carvings on bedrock, long scratches where moraine has been dragged over the bedrock causing erosion which has run parallel to the direction of ice movement which can be used to calculate the direction of ice movement and the extent ice has retreated.
Striations are a result of glacial erosion. When the glacial trough erodes down to sea level or below often the ice can retreat and a Fjord can be developed. Striations are carvings on bedrock, long scratches where moraine has been dragged over the bedrock causing erosion which has run parallel to the direction of ice movement which can be used to calculate the direction of ice movement and the extent ice has retreated.