Zealandia (Te Riu-a-Māui)
"Earth's 8th continent: A 4.9 million km² continental crust mass, 94% submerged beneath the Pacific"
Twice the size of the Indian subcontinent, Zealandia broke away from Gondwana roughly 83 million years ago and thinned out, sinking into the ocean by 23 million years ago. Only New Zealand and New Caledonia remain above sea level.
Cartographic Origin Story
First hypothesized by Bruce Luyendyk in 1995; formally confirmed in 2017 through satellite gravimetry, seabed rock dredging, and deep-sea core samples proving continental granitic crust rather than oceanic basalt.
Forces a radical revision of terrestrial-centric world maps by incorporating bathymetric continental shelf geology.
Scientific Disproof or Geological Fate
Officially recognized by the Geological Society of America in 2017 as Earth's 8th submerged continent.