New pollen-stratigraphic evidence for the deglaciation and lake drainage chronology of the Glen Roy-Glen Spean area

Synopsis Pollen-stratigraphic evidence is presented from a number of sites in Glen Roy and lower Glen Treig. The new data do not support the chronology of the Glen Roy-Loch Laggan proglacial lake drainage proposed by Macpherson (1978). The evidence also has a bearing on the controversy over the age of outwash fan deposits in upper Glen Roy, and this problem is re-examined here. Since no Late Devensian Lateglacial deposits are found anywhere in the region, whereas early Flandrian (Holocene) successions are found in several basins, the evidence as a whole is interpreted as indicating that the outwash deposits at the Roy–Turret confluence are of Loch Lomond Stadial age.