pumice

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NASA's Terra satellite captured the mass of floating pumice rock on Aug. 13. NASA hide caption

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NASA

Asia

Giant Pumice Raft Floating Toward Australia Could Help Replenish Great Barrier Reef

August 25, 2019 • An underwater volcano is thought to have produced a sheet of pumice that stretches 58 square miles.

7,500 Square Miles Of Pumice Floating In Pacific Is 'Weirdest Thing I've Seen'

This photo photo from the New Zealand Defense Force shows a handful of the rocks found floating in the South Pacific. EPA /Landov hide caption

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EPA /Landov

The Two-Way

7,500 Square Miles Of Pumice Floating In Pacific Is 'Weirdest Thing I've Seen'

August 10, 2012 • The rocks, floating in the waters near New Zealand, must have been created by an underwater volcano. The floating mass is about 200 square miles larger than New Jersey.