Wikipedia contributors. (2023, January 3). Minnesota Commercial Railway. In Wikipedia, The Free Encyclopedia. Retrieved July 18, 2024, from https://en.wikipedia.org/w/index.php?title=Minnesota_Commercial_Railway&oldid=1131327846
If the cirque is subject to seasonal melting, the floor of the cirque most often forms a tarn (small lake) behind a dam, which marks the downstream limit of the glacial overdeepening.