<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (September 2010) (Learn how and when to remove this template message) </Td> </Tr> <P> The geological history of Antarctica covers the geological development of the continent through the Proterozoic Eon, Paleozoic, Mesozoic and Cenozoic eras . </P> <P> More than 170 million years ago, Antarctica was part of the supercontinent Gondwana . Over time Gondwana broke apart and Antarctica as we know it today was formed around 35 million years ago . </P> <P> The Mawson craton of East Antarctica and Australia preserves evidence of tectonic activity from the Archean through the Mesoproterozoic in the Terre Adelie, King George V Land and the Miller Range of the central Transantarctic Mountains . </P>

When did antarctica take the form it has today