Debris dispersed throughout the interior of a glacier. It originates either as surface debris that is buried in the accumulation area or falls into crevasses, or in basal debris that is raised from the bed by thrusting or folding.
Englacial debris layers in the advancing cliff of Thompson Glacier, Axel Heiberg Island, define complex folding (q.v.) and thrust (q.v.) structures. Photo M. J. Hambrey, 1975.