The mystery of the pumice raft

By Rebecca Priestley In Science

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8th September, 2012
I was on the bridge of the HMNZS Canterbury, chatting to marine geologist Helen Bostock about the line of underwater volcanoes tracking 130 nautical miles to the east of us, when we heard Commander Sean Stewart give the order to change course. We were about 25 hours’ sailing north of Auckland, en route to Raoul Island, an active volcano in a line of mostly underwater volcanoes known as the Kermadec Arc. The GNS Science volcanologist who was to join the voyage had been recalled to respond to the Mt Tongariro and White Island eruptions. Bostock, who works at Niwa in Wellington, became the ...

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