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Geologists Spy an Eighth Continent: Zealandia

Accepted submission by charon at 2017-02-18 20:15:58
Science

Beneath the waves in the southwest Pacific Ocean lies a mostly hidden realm — dubbed Zealandia [nature.com] — that deserves to be called a continent, geologists say.

Geophysical data suggest that a region spanning 5 million square kilometres, which includes New Zealand and New Caledonia, is a single, intact piece of continental crust and is geologically separate from Australia, a team of scientists from New Zealand, Australia and New Caledonia argue in the March/April issue of GSA Today. (see 'Hidden crust' [Ed. Note: this refers to a map in source article.])

"If you could pull the plug on the world's oceans, then Zealandia would probably long ago have been recognized as a continent," says team leader Nick Mortimer, a geologist at GNS Science in Dunedin, New Zealand.

However, there is no international body in charge of designating official continents, and so the researchers must hope that enough of their colleagues agree to recognize the landmass. Otherwise, their proposal could remain more of a theoretical wish than a radical reshaping of what every child has to learn in geography class.

Mortimer, N. et al. GSA Today http://dx.doi.org/10.1130/GSATG321A.1 [doi.org] (2017).


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