The Scotia Plate, named after the sea which overlies it, is a tectonic plate on the edge of the South Atlantic and Antarctic Ocean. Thought to have formed during the early Eocene with the opening of the Drake Passage, it is a minor plate whose movement is largely controlled by the two major plates that surround it; the South American plate and Antarctic plate. Having formed as oceanic crust, it is almost completely submerged with only the small exception of the South Georgia Islands on its north-eastern edge and the southern tip of South America.
Read more about Scotia Plate: Tectonic Setting, South Georgia Islands, Paleo-tectonics
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