TREE-RING ANALYSIS OF MOVEMENT OF A ROCK-GLACIER COMPLEX ON MOUNT MESTAS, COLORADO, USA
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Snow-avalanche debris, talus, and other slope deposits derived from a Tertiary pluton and surrounding Cretaceous and Tertiary sedimentary rock supply rock fragments to 23 rock glaciers on Mount Mestas, Colorado. One prominent ice-cemented rock-glacier complex is studied. Data derived from tree-rings show periods of movement in two directions, one to the NW down the 'slump and flow', and the other SW down the ice-cemented rock glacier.-from Authors