Holocene sand dunes on Enderby Island, Auckland Islands

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Abstract
On Enderby Island, Holocene sand dunes are separated into lower and upper deposits by layers of peat and silt. The lower deposits contain roughly equal proportions of shell fragments and basalt grains; the upper deposits are almost entirely shell fragments. The dunes overlie lagoon muds which probably accumulated behind an old stranded beach ridge at a time when sea level was some 2 m higher than today. Radiocarbon dating gives an age for the lower deposits of between 5700 and 2800 years B.P., and for the upper deposits of less than 2800 years B.P. The dunes are thought to have begun accumulating when the sea breached a gap between Enderby Island and Rose Island.

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