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Late Amazonian glaciation at the dichotomy boundary on Mars: Evidence for glacial thickness maxima and multiple glacial phases

Head, James W.; Marchant, David R.; Dickson, James L.

Lineated valley fill (LVF) in fretted valleys at the dichotomyboundary has been interpreted as glacial in origin. Unknownare (1) the original thickness of the glacier ice, (2) the amountof ice-surface lowering, through sublimation and retreat, toits presently observed level, and (3) whether there were multipleperiods of glaciation. We address thes…