Submerged continent two-thirds size of Australia discovered

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An underwater 'lost continent' two-thirds the size of Australia and being named Zealandia has been discovered.

And the giant land mass submerged in the southwest Pacific is also a step closer to being recognised as a separate continent in its own right if scientists get their way.

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New Zealand (the country) sits on top of the 1.9 million-square-mile expanse which may be 94% covered by water but meets all the other criteria applied to each of the seven other continents.

Once part of the Gondwana super-continent which also included Australia, Zealandia is roughly the same size as the Indian subcontinent.

It is believed to have broken away about 100 million years ago, according to geologists, and sank between 60-85 million years ago.

Credits: Alexrk
The vast land mass is 94% under water


As well as both the North and South Islands of New Zealand, Zealandia also includes New Caledonia, Norfolk Island, the Lord Howe Island group and Elizabeth and Middleton reefs among other territories and islands previously grouped with Australia in Australasia.

Lead author Nick Mortimer explained how scientists have been gathering data to make the case for Zealandia for the last two decades - an undoubted challenge with most of it submerged.

He told The Guardian: "This is a big piece of ground we're talking about, even if it is submerged."

Credits: NOAA
The continent is believed to have sunk around 80 million years ago


A paper published in the Geological Society of America's journal, GSA Today, says: "The scientific value of classifying Zealandia as a continent is much more than just an extra name on a list.

"That a continent can be so submerged yet unfragmented makes it (useful)... in exploring the cohesion and breakup of continental crust."

Mr Mortimer told TVNZ: "If we could pull the plug on the oceans, it would be clear to everybody that we have mountain chains and a big, high standing continent.

"What we hope is that Zealandia will appear on world maps, in schools, everywhere.

"I think the revelation of a new continent is pretty exciting."

See also: Tourist in Australia snaps photo that looks like map of country

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