ABSTRACT
Bands and tracts of hummocks commonly mark the former margins of the great ice sheets that covered Europe and North America during the Late Pleistocene. These landforms are best explained as forming by the collapse of abundant supraglacial debris during the melting of stagnant glacier ice, and hence are said to make up the supraglacial landsystem. It is also possible that subglacial squeezing of soft till contributes to landform development, and, in that case, this landsystem may be better described as the ‘stagnant-ice landsystem.’
