Debris that is carried on the surface of a glacier. It is normally derived from rockfalls and tends to be angular in character. More rounded material may also be present, raised from the glacier bed or reworked by surface streams.
Supraglacial debris and ponds on the surface of stagnating Khumbu Glacier, Nepal. The prominent peak (horn) in the background is Pumori. Photo M. J. Hambrey, 2004.