Multiple Alpine Glaciation in the Leavenworth Area, Washington

In this area there is evidence for three successive Pleistocene glaciations, each of which was less extensive than the preceding one. The first two glaciations were separated by a long interval. The third is fairly well established as a distinct event but may possibly represent a phase of the preceding stage. In any case the third glaciation is undoubtedly equivalent to all or to part of the Wisconsin stage.