Abstract
Mass flow in lobate rock glaciers is discussed, and an alternative to the rotational flow pattern suggested by Sweet et al. 1980 for lobate rock glaciers in Spitsbergen is proposed. It is suggested that flow trajectories in lobate rock glaciers generally have a downslope component, and that surface lows, "inner depressions," today found on many lobate rock glaciers, develop during a period of relative warmth especially in a part of the rock glacier where much ice is included in the rock glacier body. "Inner depressions," rather than being the result of active, rotational flow, are thought to be a degeneration form and may be used as a criterion for inactivity of lobate rock glaciers.
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