| 词条 | Atlantica |
| 释义 |
Atlantica ({{lang-gr|Ατλαντικα}}; Atlantika) is an ancient continent that formed during the Proterozoic about {{mya|2000}} (two billion years ago, Ga) from various 2 Ga cratons located in what is now West Africa and eastern South America. [1]The name, introduced by {{harvnb|Rogers|1996}}, was chosen because the continent opened up to form the South Atlantic Ocean. [2]FormationAtlantica 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.[3] BreakupAtlantica separated from Nena between 1.6–1.4 Ga when Columbia — a supercontinent composed of Ur, Nena, and Atlantica — fragmented. [2]Together with continents Nena and Ur and some minor plates, Atlantica formed the supercontinent Rodinia about 1 Ga ago. The rifting of Rodinia between 1–0.5 Ga resulted in the formation of three new continents: Laurasia and East and West Gondwana, of which Atlantica became the nucleus of the latter. [1]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 the Atlantic Ocean. [4][5]See also
Notes1. ^1 {{harvnb|Rogers|1996}} 2. ^1 {{harvnb|Sankaran|2003| p=1122}} 3. ^{{harvnb|Yoshida|Windley|Dasgupta|2003| p=16}} 4. ^{{harvnb|Alkmim|Marshak|Pedrosa-Soares|Peres|2006 | loc=Abstract}} 5. ^{{harvnb|Noce|Pedrosa-Soares|da Silva|Armstrong|2007| p=60}} References
| last1 = Alkmim | first1 = Fernando F. | last2 = Marshak | first2 = Stephen | last3 = Pedrosa-Soares | first3 = Antônio Carlos | last4 = Peres | first4 = Guilherme Gravina | last5 = Cruz | first5 = Simone Cerqueira Pereira | last6 = Whittington | first6 = Alan | title = Kinematic evolution of the Araçuaí-West Congo orogen in Brazil and Africa: Nutcracker tectonics during the Neoproterozoic assembly of Gondwana | journal = Precambrian Research | volume = 149 | issue = 1-2 | date = September 1, 2006 | pages = 43–64 | doi = 10.1016/j.precamres.2006.06.007 | bibcode = 2006PreR..149...43A}}
| last1 = Noce | first1 = Carlos M. | last2 = Pedrosa-Soares | first2 = Antônio Carlos | last3 = da Silva | first3 = Luiz Carlos | last4 = Armstrong | first4 = Richard | last5 = Piuzana | first5 = Danielle | title = Evolution of polycyclic basement complexes in the Aracuaí Orogen, based on U–Pb SHRIMP data: Implications for Brazil–Africa links in Paleoproterozoic time | journal = Precambrian Research | issue = 159 | year = 2007 | pages = 60–78 | url = http://www.cprm.gov.br/publique/media/paleop_MG.pdf | doi = 10.1016/j.precamres.2007.06.001 | bibcode = 2007PreR..159...60N}}
| title = A History of Continents in the Past Three Billion Years | last = Rogers | first = John J. W. | journal = The Journal of Geology | volume = 104 | issue = 1 |date=January 1996 | pages = 91–107 | jstor = 30068065 |bibcode = 1996JG....104...91R |doi = 10.1086/629803 }}
| last = Sankaran | first = A. V. | title = The supercontinent medley: Recent views | journal = Current Science | year = 2003 | volume = 85 | issue = 8 | pages = 1121–1123 | url = http://www.iisc.ernet.in/currsci/oct252003/1121.pdf }}
| title = Proterozoic East Gondwana: supercontinent assembly and breakup | publisher = Geological Society of London | volume = 206 | editor1-last = Yoshida | editor1-first = Masaru | editor2-last = Windley | editor2-first = Brian F. | editor3-last = Dasgupta | editor3-first = Somnath | year = 2003 | isbn = 1-86239-125-4 | url = https://books.google.com/books?id=4B8nrDVjaCgC&pg=PA16 }}{{Continents of the world}} 3 : Historical continents|Proterozoic|History of the Atlantic Ocean |
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