Glaciers Flashcards
What is the formation of a arête
Two glaciers erode back to back by plucking
The narrow ridge left in between is an arête
Freeze thaw weathering makes the ridge sharper
What is the formation of a Corrie
Snow collects in a north facing hollow snow then builds up and compressed into ice
The ice moves downhill due to gravity as a glacier freeze thaw weathering an plucking make the back wall steeper an jagged
After th flier melts it leaves an armchair shaped hollow called a Corrie
What is the formation of a pyramidal peak
A pyramidal peak form when three virtues cut into the same mountain by plucking and abrasion
Where the corries side wall meets they form a ridge a pyramidal peak is a steep pointed mountain top
The arêtes join at the top to make a pyramidal peak
The formation of a u shaped valley
Snow collect and accumulates in a v shaped valley
The snow gets compressed and turns into glacial ice the ice then moves downhill due to gravity
Abrasion will erode the bottom to make it deep and the idea o make it wise
This creates a u shaped valley if they’re is water in it it called a ribbon lake
Plucking
Between the glacier an rock is a thin film of melt water
Sometimes the water freezes cause if the rock to stick to the glacier
Then the glacier moves forward, pulling out rock
Freeze thaw weathering
Rainfall fills a crack in the road in the winter it freezes turns into ice when it freezes the ice expands forcing the crack to be bigger
It then melts and water fills up again and it refreshes
This process will happen over and over pieces of rock will break off
Abrasion
This is when the rock turns into glacial ice it moves down the rock scrapping te valley floor and the sides eroding it
This is known as the sandpaper effect
Damage to farmers
Tourist leave gates open
Park I front of gates
Or let their dog if it’s lead allowing it to chase animals
To ease conflict tourist cause to farmers
They reduce footpath erosion by putting down rocks
Adding a spring to the gate so it closes
Take away bins forcing the to take their rubbish home
Farming land use
Farmers can rent out fields for parking
On the valley floor and lower slopes some farmers keep cattle