Stone run

（重定向自Stone stream）

Typical stone river on Vitosha Mountain, Bulgaria.

Charles Darwin few years after his survey of the Falklands stone runs

Stone ‘city gates’ and ‘amphitheatre’ on the East Falkland (Dom Pernety, 1769).

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.

单词	Stone stream
释义	Stone stream 英语百科 Stone run （重定向自Stone stream） 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.
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