More on Zealandia at www.geosociety.org/gsatoday/archive/27/3/article/GSATG321A.1.htm … which seems to be the full paper (forwarded by Jovan). It is 6 pages long (8 pages with notes and references). Zealandia was formerly part of Gondwana Land – along with Australia and Antarctica. At some point it split apart. Some 94 per cent of Zealandia is now submerged but the process began in the Late Cretaceous – at the same time the Atlantic Ocean began to expand. It has since undergone substantial deformation.
see also www.nature.com/news/geologists-spy-an-eighth-continent-zealandia-1.21503 … and www.scientificamerican.com/article/geologists-spy-an-eighth-continent-ze…