The Bellona Platform is a submarine geological feature encompassing the Chesterfield Islands () and Bellona Reefs () west of New Caledonia. It was once a landmass, previously with large islands with land areas totalling around which became mostly submerged when sea levels rose at the end of the Last Glacial Maximum, 20,000 years ago. These former islands might have played a role in the spread of flora and fauna, including humans, in the southwest Pacific.
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