The glaciation which followed the Hoxnian Interglacial; a pale, chalky till (the Gipping Till) occurs in East Anglia, England, and the stone orientation and the included erratics suggest a movement from the north. The general stratigraphy needs clarification since it is not certain that the till rests on Hoxnian deposits and there are a number of morainic deposits attributed to this glacial which occur in Norfolk. During this ice advance a large lake, Lake Harrison, was ponded up in the Midlands. The Wolstonian perhaps correlates with the Saalian. The Wolstonian stage is named after Wolston, Warwickshire, England, where the relevant deposits were first discovered.