A nearly vertical channel in ice that is formed by flowing water; usually found after a relatively flat section of glacier in a region of transverse crevasses; also called a pothole.
A narrow, tubular chute or crevasse through which water enters a glacier from the surface. Occasionally, the lower end of a moulin may be exposed in the face of a glacier or at the edge of a stagnant
block of ice. (glacier mill)
(from the French) A water-worn pothole formed where a surface meltstream exploits a weakness in the ice. Many moulins are cylindrical, several metres across, and extend down to the glacier bed, often
in a series of steps.
Natural elevation rising to a relatively great height. Mountain, hill and knoll are terms indicating various degrees of height in descending order, varying with the general configuration of the vicini
ty. The term mountains may be used for a grouping within a range.