The continent is as big as India or the entire of Europe: its total land area is about five million square kilometers, according to the researchers. Now, for the most part, it is 94 percent submerged underwater, while the islands of New Caledonia and New Zealand's North and South Islands make up the above-water elements of the continent.
The authors of the study, published in GSA, backed their findings with satellite observations and the results of gravimetry in particular. Gravimetry is the measurement of the strength of a gravitational field, according to which Zealandia consists of continental crust, rather than oceanic crust or volcanic rocks.
The geologists proposed to recognize Zealandia as a continent, along with Europe, Asia, Africa, Australia, Antarctica, North America and South America.