Movement of ice-cemented rock glaciers by hydrostatic pressure: an example from Mount Mestas, Colorado. Academic Article

Study of the internal characteristics of the rock glaciers and associated features supports the hypothesis that their movement results from trapping of water within. The water is confined between either permafrost or an impervious layer on the bottom of the rock glacier and a frozen surface layer. Pressure applied at the head of the rock glacier due to the addition of mass reduces shear resistance and aids movement along the unfrozen/frozen interface. -from Author

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