Daniel E. Lawson

TL;DR: In this paper, simple insights from the physics of ice, water and sediment place constraints on the possible sediment-transport behavior of glaciers and ice sheets, and several sediment-entrainment mechanisms may be active beneath a single glacier, but one process is likely to be dominant at any place and time.

TL;DR: In the case of the Matanuska Glacier as discussed by the authors, sediment is trapped by this growing ice, forming stratified debris-laden basal ice, and the large sediment fluxes that this mechanism allows may have implications for interpretation of the widespread deposits from ice that flowed through other overdeepenings, including Heinrich events and the till sheets south of the Laurentian Great Lakes.

TL;DR: It is found that the long profiles of beds of highly erosive glaciers tend towards steady-state angles opposed to and slightly more than 50 per cent steeper than the overlying ice–air surface slopes, and that additional subglacial deepening must be enabled by non-glacial processes.

TL;DR: In this paper, the authors used ground-penetrating radar to profile the depth of permafrost, to groundwater beneath permacrocessions, and to bedrock in alluvial sediments of interior Alaska, and calculated dielectric permittivities for frozen and unfrozen materials.

TL;DR: In this article, a simple theory supports field observations that subglacial water flow out of overdeepenings can cause accretion of layered, debris-bearing ice to the bases of glaciers.