Synopsis

Polyphase deformation of glaciolacustrine sediments in the Cairngorm Mountains suggests ice-margin oscillations within a plateau ice-field outlet lobe following the Late Devensian Glacial Maximum, c. 18 ka 14C BP. Lithostratigraphical analysis of exposures of glacial lake sediments in Gleann Einich reveals that an initial phase of proglacial thrusting was followed by a phase of subglacial deformation resulting from glacier-overriding from the south. Subsequent ice retreat led to the deposition of more extensive lake and delta sediments. This new model of active retreat supports recent theories of a Late Devensian deglaciation punctuated by ice-margin readvances.

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