Erosional Landforms Flashcards
How is a pyramidal peal formed?
When 3 corries develop back to back
The glaciers have carved away at the top of the mountain
What other landforms can be seen on a pyramidal peak?
Arête
Tarn
Corrie armchair shape hollow
How is a hanging valley formed?
These are created where in times of glaciation a tributary glacier would have met a main glacier
The main glacier has more mass therefore will pick up more rocks from plucking for abrasion and the valley is eroded more
The tributary glacier has less mass therefore less erosive power
Post glaciation the tributary valley is left hanging above the main glacier
How is a glacial trough formed?
When a glacier moves through a V shape valley it plucks rock from the sides and base and uses them in abrasion. This process widens and deepens the valley to a U shape
How are truncated spurs formed?
This occurs where a glacier passes through interlocking spurs and cuts them off
How is a Roche moutonnée
These form
