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- Q638206 subject Q6431951.
- Q638206 subject Q6953247.
- Q638206 subject Q6953861.
- Q638206 subject Q7348574.
- Q638206 subject Q7503773.
- Q638206 subject Q8790096.
- Q638206 abstract "Arctica or Arctida was an ancient continent which formed approximately 2.5 billion years ago in the Neoarchean era. It was made of Archaean cratons, including the Aldan, Anabar/Angara, Slave, Wyoming, Superior, and North Atlantic cratons. Arctica was named by Rogers 1996 because the Arctic Ocean formed by the separation of the North American and Siberian cratons. Russian geologists writing in English call the continent "Arctida" since it was given that name in 1987, alternatively the Hyperborean craton, in reference to the hyperboreans in Greek mythology.In his reconstruction of the supercontinent cycle, Rogers proposed that the continent Ur formed at about 3 Ga and formed East Gondwana the Middle Proterozoic by accretion to East Antarctica; Arctica formed around 2.5–2 Ga by the amalgamation of the Canadian and Siberian shields plus Greenland; and Atlantica formed around 2 Ga by the amalgamation of the West African Craton and eastern South America. Arctica then grew around 1.5 Ga by accretion of East Antarctica and Baltica to form the supercontinent Nena. Around 1 Ga Nena, Ur, and Atlantica collided to form the supercontinent Rodinia.In the reconstruction of Metelkin, Vernikovsky & Matushkin 2015, Arctica originally formed as a continent during the Tonian 950 Ma and became part of the supercontinent Rodinia. It reformed during the Permian-Triassic 255 Ma and became part of Pangaea. During this period the configuration of Arctica changed and the continent moved from near the Equator to near the North Pole while keeping its position between three major cratons: Laurentia, Baltica, and Siberia.Remains of the last continent are now located on the Kara Sea Shelf, New Siberian Islands and adjacent shelf, Alaska north of Brooks Ridge, Chukchi Peninsula in eastern-most Siberia, and fragments in northern Greenland and Northern Canada and in the submerged Lomonosov Ridge.".
- Q638206 wikiPageExternalLink Khain%20et%20al%202009.pdf.
- Q638206 wikiPageExternalLink 1121.pdf.
- Q638206 wikiPageExternalLink pr-2015-259-114.pdf.
- Q638206 wikiPageExternalLink 55d840f308aeb38e8a85ec5d.pdf.
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- Q638206 wikiPageWikiLink Q6431951.
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- Q638206 wikiPageWikiLink Q6953861.
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- Q638206 comment "Arctica or Arctida was an ancient continent which formed approximately 2.5 billion years ago in the Neoarchean era. It was made of Archaean cratons, including the Aldan, Anabar/Angara, Slave, Wyoming, Superior, and North Atlantic cratons. Arctica was named by Rogers 1996 because the Arctic Ocean formed by the separation of the North American and Siberian cratons.".
- Q638206 label "Arctica".