Here's more about them:

* Formation: Cirques are formed by glacial erosion. As glaciers move down a mountainside, they carve out the bedrock, creating these bowl-shaped depressions.

* Features:

* Steep back walls

* A relatively flat floor

* A lip or threshold at the lower end

* Location: Found at the heads of valleys, often forming the source of streams or rivers.

* Significance: Cirques are important indicators of past glacial activity and play a role in shaping the landscape of mountainous regions.

Let me know if you'd like to know more about glaciers or other landforms!