Synopsis Moraines in Glen Callater, Glen Muick and the four corries of Lochnagar are used to delimit a glacial readvance. The freshness of the forms and their relation to large solifluction lobes imply that the readvance is the Loch Lomond or Zone III Readvance. The very different type of interpretation recently given by Sugden for the adjacent Cairngorm area is discussed and rejected.
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Sissons et al. (1972) studied this question.
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