Phenomena resulting specifically from the existence of plateau glaciers have been little noted in geological literature. Plateau glaciers have been described as a transitional type between mountain and continental glaciers, but they are actually sui generis. The significant characteristic of mountain glaciers is said to be the existence of unglaciated (in the sense of not overridden) rock summits at their heads. The snow-ice dome of the reservoir area of a representative plateau glacier does not even reflect the underlying rock relief. The margins of continental glaciers are at low altitudes, remote from the dispersion centers. Plateau glaciers terminate on the upland of their origin and exhibit the névé line and ice margin in essentially the same elevation.
Ahlmann,1 recognizing the defects of earlier attempts at classification, “hesitatingly” devised one. This takes into consideration the difficulties above suggested, by approaching the problem from two angles. Thus, on the basis of . . .