A channel cut by the action of glacial meltwater or by water from an ice-dammed lake (overflow channel). Various types may be recognized, classified by the position of the channel with reference to the glacier (e.g. icemarginal, englacial, or subglacial). Usually these channels are steep-sided and flat-floored, and are unrelated to the present drainage pattern.
Subjects: Ecology and Conservation — Earth Sciences and Geography.