This cross-section of the Avoca valley in north Canterbury was drawn by Julius Haast after he had surveyed the area. The position of the glacier in 1866 is shown on the right, with a series of terminal moraines (gravel ridges) further down-valley, indicating the glacier’s retreat from past positions.
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Reference: Julius Haast, Report on the headwaters of the River Rakaia. Christchurch: Government Print, 1867
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