Explanation: Cirques are the most common landforms in glaciated mountains. The cirques quite often are found at the heads of glacial valleys.

• The accumulated ice cuts these cirques while moving down the mountain tops.
• They are deep, long and wide troughs or basins with very steep concave to vertically dropping high walls at its head as well as sides.
• A lake of water can be seen quite often within the cirques after the glacier disappears. Such lakes are called cirque or tarn lakes.
• There can be two or more cirques one leading into another down below in a stepped sequence.

Source: NCERT – Fundamental of Physical Geography