2 articles
Moulin (geomorphology)
Moulin (glacier mill, pothole): a nearly vertical water-worn shaft in a glacier draining surface meltwater into englacial and subglacial drainage; catchments of 1–5 km², depths from 30–40 m in alpine glaciers to 500–1000 m in Greenland, controlling meltwater delivery to the bed.
Supraglacial lake
Supraglacial lakes are meltwater ponds on glacier and ice-sheet surfaces in Greenland and Antarctica. They store runoff, drain by hydrofracture or overflow, modulate ice flow, and can trigger ice-shelf breakup.