8. A stone run (called also stone river, stone stream or stone sea is a conspicuous rock landform, result of the
erosion of particular rock varieties caused by myriad freezing-thawing cycles taking place in periglacial
conditions during the last Ice Age. The actual formation of stone runs involved no less than five processes:
weathering, solifluction, frost heaving, frost sorting, and washing. The stone runs are essentially different from
moraines, rock glaciers, and rock flows or other rock phenomena involving the actual flow of rock blocks under
stress that is sufficient to break down the cement or to cause crushing of the angularities and points of the
boulders. By contrast, the stone run boulders are fixed quite stably, providing for safer climbing and crossing of
the run.