Flow unit

A distinct “stream” of ice in a valley glacier, commonly bounded by lateral and medial moraines. The term applies down-stream of the zone of convergence of two or more valley glaciers.

Two major flow units, Vadret Pers (1) and Vadret da Morteratsch (2) combine to form the tongue of a major valley glacier in Grisons, Switzerland. Aerial photo J. Alean, 1982.