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GSA Today Zealandia: Earth’s Hidden Continent Cover Image 2 GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand 3 SGEES, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand 4 Service Géologique de Nouvelle Calédonie, B.P. 465, Nouméa 98845, New Caledonia 5 School of Geosciences, University of Sydney, NSW 2006, Australia Abstract A 4.9 Mkm 2 region of the southwest Pacific Ocean is made up of continental crust. The region has elevated bathymetry relative to surrounding oceanic crust, diverse and silica-rich rocks, and relatively thick and low-velocity crust...

Earth’s mountains may have mysteriously stopped growing for a billion years Starting about 1.8 billion years ago, the planet's continental crust thinned, slowing the flow of nutrients into the sea and possibly stalling the evolution of life. ByMaya Wei-Haas Email If you could explore Earth’s surface a billion years ago, the most remarkable sight might be the world’s un-remarkability. There would be no trees or bugs, nor birds overhead. The only life is simple and small, a slimy oceanic soup. Science points to yet another feature that may be missing: towering mountains. The restless tect...