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Rodinia (from the Russian родина, rodina, meaning "motherland, birthplace" [1] [2] [3]) was a Mesoproterozoic and Neoproterozoic supercontinent that assembled 1.26–0.90 billion years ago (Ga) [4] and broke up 750–633 million years ago (Ma). [5]
Pangaea or Pangea (/ p æ n ˈ dʒ iː ə / pan-JEE-ə) [1] was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. [2] It assembled from the earlier continental units of Gondwana , Euramerica and Siberia during the Carboniferous approximately 335 million years ago, and began to break apart about 200 million years ...
Pangaea's supercontinent cycle is a good example of the efficiency of using the presence or lack of these entities to record the development, tenure, and break-up of supercontinents. There is a sharp decrease in passive margins between 500 and 350 Ma during the timing of Pangaea's assembly.
From the Triassic to the Early Jurassic, before the break-up of Pangaea, archosaurs (crurotarsans, pterosaurs and dinosaurs including birds) had a global distribution, especially crurotarsans, the group ancestral to the crocodilians. This cosmopolitanism ended as Gondwana fragmented and Laurasia was assembled.
The continents that had drifted away from Rodinia drifted together again during the Paleozoic: Gondwana, Euramerica, and Siberia/Angara collided to form the supercontinent of Pangea during the Devonian and Carboniferous periods, some 350 million years ago. Pangea was a short-lived supercontinent; it began to break apart again in the early ...
As such, these lands are commonly described as Russian-occupied territories, regardless of what their status is in Russian law. The term is applied to Georgia (in Abkhazia and South Ossetia ), Moldova (in Transnistria ), and Ukraine (in Crimea, Donetsk, Luhansk, Kherson, and Zaporizhzhia ).
Map showing areas ceded by Finland to the Soviet Union; Porkkala was returned to Finland in 1956. The Karelian question or Karelian issue (Finnish: Karjala-kysymys, Swedish: Karelska frågan, Russian: Карельский вопрос) is a dispute in Finnish politics over whether to try to regain control over eastern Karelia and other territories ceded to the Soviet Union in the Winter War ...
Pangea broke apart after 70 million years. The supercontinent was torn apart through fragmentation, which is where parts of the main landmass would break off in stages. There were two main events that led to the dispersal of Pangea. The first was a passive rifting event that occurred in the Triassic period.