II. INTERPRETATION OF THE NUMERICAL ANALYSES IN TERMS OF LATE-DEVENSIAN (LATE-WEICHSELIAN) ENVIRONMENTAL HISTORY


SUMMARY

The zone boundaries, justified by numerical analysis in Section I, are referred to dated horizons on two series of Late Devensian 14C dates, from respectively Blelham Bog, Lancashire (Q 758, I-3589–3598) and Cam Loch, Sutherland (SSR-247–253). Reasons are given for the interpretation of these now objectively determined horizons as indicative of environmental changes at each date. The sequence of two fluctuations within one major oscillation is compared with firstly, the Late-Weichselian sequence of two interstadials, Böiling and Alleröd, and secondly, the sequence of one Late-Devensian interstadial which has been described by the author and others from lowland sites in West Britain. It is suggested that the sequence of environmental changes indicated by these profiles, from Blea Tarn in the Lake District uplands and Cam Loch in the extreme north of West Britain, serves to reconcile these two apparently contrasted sequences, in terms of regional differentiation of climate and vegetation in North-west Europe during the period c. 15000 to 10000 14C-years ago.

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