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Detailed study of the Kaitorete barrier enclosing Lake Ellesmere suggests that barrier formation took place 6 000–7 000 years ago when sea level was still rising in this area. Relic cliffs and shore platforms west of Birdlings Flat date from the last interglacial or earlier. Barrier development has now ceased and shore‐line erosion is extending eastwards across the barrier.
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John W. Armon (1974) studied this question.
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