both the nature of the materials released and the continuous path of debris release. Some paths extend more than 3000 km distant from the point at which the ice floes originally broke free.

The location and altitude of ice-rafted boulders relative to the modern landscape has been used to identify the highest level of water in proglacial lakes (e.g. Lake Musselshell in central Montana) and temporary lakes (e.g. Lake Lewis in Washington