Exmoor was to the south of the ice-sheet during the last glacial period though it has been postulated that a small glacier may have occupied the anomalously deep feature on the north side of Winsford Hill known as the Punchbowl. During the earlier Anglian glaciation, the British ice-sheet extended as far south as the present day north coast of Somerset and Devon. Exmoor would have been subject to intense periglacial processes at this time and during other glacial periods.