Explanation:

Erosional landforms of Glaciers
Cirque/Corrie

• Hollow basin cut into a mountain ridge.
• It has steep sided slope on three sides, an open end on one side and a flat bottom.
• When the ice melts, the cirque may develop into a tarn lake.

Glacial Trough

• Original stream-cut valley, further modified by glacial action.
• It is a ‘U’ Shaped Valley. It at mature stage of valley formation.
• Since glacial mass is heavy and slow moving, erosional activity is uniform –
• horizontally as well as vertically.
• A steep sided and flat bottomed valley results, which has a ‘U’ shaped profile.