Abstract
Herefordshire has been subject to glaciation during at least two cold stages of the Pleistocene Epoch. During Middle Pleistocene glaciation, an ice-sheet, emanating from a Welsh ice-cap, extended across Herefordshire as far as the Cradley Brook Valley, on the western margins of the Malvern Hills. The sediments deposited by this ice-sheet, the Risbury Formation, occur as a sequence of small remnants outside of the Late Devensian limit in northeast Herefordshire. Kinetostratigraphical members of this formation accumulated during recessional phases on the retreat of the Middle Pleistocene ice-sheet. Their sedimentological and structural characteristics record a variety of ice-marginal, glaciotectonic, glaciolacustrine and glaciofluvial regimes. Observations demonstrate that active retreat occurred, with minor, localized stagnation in association with a polythermal ice-margin.
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