Historic Supercontinents

List the supercontinents that have previously existed on Earth.

Some supercontinents formed once, then became part of a larger continent, and then broke away again. For such supercontinents, the initial time of their formation is listed, not the time they broke away from the larger continent.

"Ma" = Million years ago

"Ga" = Billion years ago

Information according to various sources

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Last updated: August 19, 2016

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First submitted	August 19, 2016
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Believed Time of Formation	Supercontinent
~ 3.6 Ga (hypothesized)	Vaalbara
~ 3 Ga (hypothesized)	Ur
~ 2.7 Ga	Kenorland
~ 1.8 Ga	Columbia
~ 1.1 Ga	Rodinia
~ 750 Ma	Proto-Laurasia
~ 650 Ma	Pannotia
~ 570 Ma	Gondwana
~ 500 Ma	Laurasia
~ 270 Ma	Pangaea