Moulin (geomorphology)

A hiker peers into a massive moulin on Snowbird Glacier, in the Talkeetna Mountains of Alaska

Schematic drawing of glacial features illustrating how moulins transport surface water to the base of the glacier

Surface water entering a moulin on Athabasca Glacier

A moulin or glacier mill is a roughly circular, vertical to nearly vertical well-like shaft within a glacier or ice sheet which water enters from the surface. The term is derived from the French word for mill.

They can be up to 10 meters wide and are typically found on ice sheets and flat areas of a glacier in a region of transverse crevasses. Moulins can reach the bottom of the glacier, hundreds of meters deep, or may only reach the depth of common crevasse formation (about 10–40 m) where the stream flows englacially. They are the most typical cause for the formation of a glacier cave.

单词	Glacier mill
释义	Glacier mill 英语百科 Moulin (geomorphology) A moulin or glacier mill is a roughly circular, vertical to nearly vertical well-like shaft within a glacier or ice sheet which water enters from the surface. The term is derived from the French word for mill. They can be up to 10 meters wide and are typically found on ice sheets and flat areas of a glacier in a region of transverse crevasses. Moulins can reach the bottom of the glacier, hundreds of meters deep, or may only reach the depth of common crevasse formation (about 10–40 m) where the stream flows englacially. They are the most typical cause for the formation of a glacier cave.
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Glacier mill

Moulin (geomorphology)