Adeglaciated cirque often contains a basin in which a(n can be found. a deglaciated cirque often contains a basin in which a(n can be found. tarn erratic moraine arete knickpoint

tarn

Explanation:

The deglaciated cirques very often contain tarn. The tarn can simply be explained as a lake formed from the melted ice, having a natural dam made by a moraine, glacial till, or the lip of the underlying bedrock. The tarn is a small lake, as the space is very limited. This small lake is marking the downstream limit of the glacial overdeepening.  This lakes can last for either very short period of time, or be present for a long period of time, depending on the climate conditions.

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