Abstract
Assuming that the northern ice cap of Mars is thick enough to flow like terrestrial ice sheets, a model is presented that explains (i) the origins, movement, and spiral nature of the scarp/trough complexes, (ii) the reentrant valleys like Chasma Boreale, and (iii) the layered terrain. Accumulation and ablation are discussed in relation to the scarps and a model is developed relating them to ice flow and scarp velocities and to the particle paths within the ice cap.A brief summary of terrestrial ice sheet flow and mass balance is given in order to illustrate and clarify the concepts used to model the martian ice caps.
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