New Zealand as a tiny visible part of a massive continent

New Zealand as a tiny visible part of a massive continent? The scientific case for Zealandia.
Time to stretch those geology/geophysics muscles with some light reading over the next couple of days; your own kilometrage may vary.
“Zealandia: Earth’s Hidden Continent”
Abstract:
“A 4.9 million square-kilometre 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 crustal structure. Its isolation from Australia and large area support its definition as a continent — Zealandia. Zealandia was formerly part of Gondwana. Today it is 94% submerged, mainly as a result of widespread Late Cretaceous crustal thinning preceding supercontinent breakup and consequent isostatic balance. The identification of Zealandia as a geological continent, rather than a collection of continental islands, fragments, and slices, more correctly represents the geology of this part of Earth. Zealandia provides a fresh context in which to investigate processes of continental rifting, thinning, and breakup.”
(full text + PDF available in link below, from Geological Society of America GSA Today G321A.1, 2017.)

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