Atlantica ( Greek : Ατλαντικα ; Atlantika ) is an ancient continent that formed during the Proterozoic about 2,000 million years ago (two billion years ago, Ga ) from various 2 Ga cratons located in what are now West Africa and eastern South America . The name, introduced by John Rogers in 1996, was chosen because the parts of the ancient continent are now located on opposite sides of the South Atlantic Ocean .
3-515: Atlantica formed simultaneously with Nena at about 1.9 Ga from Archaean cratons, including Amazonia in present-day South America, and the Congo, West Africa and North Africa Cratons in Africa. Atlantica separated from Nena between 1.6–1.4 Ga when Columbia — a supercontinent composed of Ur , Nena, and Atlantica — fragmented. Atlantica and continents Nena and Ur and some minor plates formed
6-561: The supercontinent Rodinia about 1 Ga ago. Between 1–0.5 Ga Rodinia split into three new continents: Laurasia and East and West Gondwana ; Atlantica became the nucleus of West Gondwana. During this later stage, the Neoproterozoic era, a Brasiliano - Pan African orogenic system developed. The central part of this system, the Araçuaí -West Congo orogen , has left a distinct pattern of deformations, still present on both sides of
9-523: The Atlantic Ocean. [REDACTED] Africa [REDACTED] Antarctica [REDACTED] Asia [REDACTED] Australia [REDACTED] Europe [REDACTED] North America [REDACTED] South America [REDACTED] Afro-Eurasia [REDACTED] Americas [REDACTED] Eurasia [REDACTED] Oceania Nena (supercontinent) Too Many Requests If you report this error to
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