Story: Historic volcanic activity

Raoul and Denham calderas

Raoul and Denham calderas

Raoul Island has been shaped by volcanic activity and marine erosion. In the last few thousand years volcanism has been centred in the Raoul and Denham calderas. These are collapse structures that formed after major volcanic eruptions. Although the Denham caldera is largely offshore, its existence has been confirmed by marine seismic surveys.

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Source: T. J. Worthington and others, ‘The Denham caldera on Raoul volcano: dacitic volcanism in the Tonga–Kermadec arc.’ Journal of Volcanology & Geothermal Research 90 (1999): 29–48

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How to cite this page:

Eileen McSaveney, Carol Stewart and Graham Leonard, 'Historic volcanic activity - Raoul Island', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/map/9847/raoul-and-denham-calderas (accessed 6 July 2020)

Story by Eileen McSaveney, Carol Stewart and Graham Leonard, published 12 Jun 2006