The Pleistocene Deposits of the Lower Part of the Great Ouse Basin

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Abstract
A paper by the present Author in the Quarterly Journal of the Geological Society (vol. lxxv, 1919–20, p. 204) dealt with the Pleistocene deposits in the immediate vicinity of Cambridge. In the present paper it is proposed to consider further discoveries there, but more particularly to describe the deposits over a wider area, and to include some general observations concerning glaciation, earth-movements, and river-diversions which were barely mentioned in the previous paper. It will be convenient to consider the sequence of events, so far as possible, in the order of their occurrence. The evidence, part of which has been published, points to the following sequence of events in the area during the Pleistocene Period:— (1) Early glaciation: (Riss?). (2) Aggradation of valleys: climate becoming somewhat warm, but later in the period again cool. Acheulean, Micoque, and possibly also early Mousterian? (Riss-Würm Interglacial?). (3) Glaciation: Mousterian? (beginning of Würm?). (4) Erosion, with subsidiary aggradation: cold, with temporary period of less cold in the middle. Aurignacian, Solutrean, and Magdalenian epochs (Bühl or recrudescence of Würm glaciation at the end, but the ice did not reach the South-East of England). (5) Azilio-Tardenoisian period. For many years the first appearance of Man in this country in post-Glacial times was generally regarded as established. This is no longer the case, and it is necessary to obtain fresh evidence as to the actual sequence of glacial and genial periods in Pleistocene times.

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