Submerged volcanoes found off Sydney


SYDNEY: A cluster of submerged volcanoes has been discovered off Sydney, scientists said Monday, with the potential to help unlock the secrets of the sea floor between Australia and New Zealand. The four extinct volcanoes were found about 250 kilometers offshore from Australia’s biggest city last month during a search for larval lobster breeding grounds. Australian National University volcano expert Richard Arculus said the volcanoes, which are spread across 20 kilometers, were “a window into the underlying mantle” beneath the seabed. Thought to be about 50 million years old, the volcanoes are at a depth of 4,900 meters, leaving them undetected until now despite the largest being 1.5 kilometers across the crater rim and rising 700 meters from the sea floor.



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