Five periods of moraine building and aggradation in the Wanaka–Hawea basin and upper Clutha Valley are due to glaciations, called in this paper, the Hawea, Albert Town, Luggate, Lindis and Clyde Advances, in order of increasing age. The deposits of the Hawea advance have been examined in some detail in natural and artificial exposures near the site of the Lake Hawea Control Dam, and a peat section, the base of which has given a radio-carbon date of 15,100 ± 200 years, shows a flora sequence over the later part of the time since the Hawea Advance.