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Triple junction
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==Examples== [[Image:Nootka Fault.gif|right|thumb|300px|The [[Nootka Fault]] at the triple junction of the [[North American plate]], the [[Explorer plate]], and the [[Juan de Fuca plate]]]] [[File:Americas Tectonic Plate Map - by NOAA.jpg|thumb|Chile triple juncton (CTJ)]] *The junction of the [[Red Sea]], the [[Gulf of Aden]] and the [[East African Rift]] centered in the [[Afar Triangle]] (the [[Afar triple junction]]) is the only R-R-R triple junction above sea level. *The [[Rodrigues triple junction]] is a R-R-R triple junction in the southern Indian Ocean, where the [[African plate|African]], the [[Indo-Australian plate|Indo-Australian]] and the [[Antarctic plate|Antarctic]] Plates meet.<ref>{{cite journal|title=Propagation of the Southwest Indian Ridge at the Rodrigues Triple Junction|first1=D.|last1=Sauter|first2=V.|last2=Mendel|first3=C.|last3=Rommeveaux-Jestin|year=1997|journal=Journal Marine Geophysical Researches|volume=19|issue=6|pages=553–567|doi=10.1023/A:1004313109111|bibcode=1997MarGR..19..553S|s2cid=127866775}}</ref> *The [[Galapagos triple junction]] is an R-R-R triple junction where the [[Nazca plate|Nazca]], the [[Cocos plate|Cocos]], and the [[Pacific plate]]s meet. The [[East Pacific Rise]] extends north and south from this junction and the [[Cocos–Nazca spreading centre]] goes to the east. This example is made more complex by the [[Galapagos Microplate]] which is a small separate plate on the rise just to the southeast of the triple junction. *[[Chiapas]] coast off Tapachula where [[Guatemala]], [[North America]] and [[Pacific]] join and small earthquakes occur weekly. This is pushed eastward by the Cocos plate. *On the west coast of North America is another unstable triple junction offshore of [[Cape Mendocino]]. To the south, the [[San Andreas Fault]], a strike-slip fault and transform plate boundary, separates the [[Pacific plate]] and the [[North American plate]]. To the north lies the [[Cascadia subduction zone]], where a section of the [[Juan de Fuca plate]] called the [[Gorda plate]] is being subducted under the [[North American plate]], forming a trench (T). Another transform fault, the [[Mendocino Fault]] (F), runs along the boundary between the Pacific plate and the Gorda plate. Where the three intersect is the seismically active, F-F-T [[Mendocino triple junction]]. *The [[Amurian plate]], the [[Okhotsk microplate]], and the [[Philippine Sea plate]] meet in Japan near [[Mount Fuji]]. (see [[Mount Fuji#Geology|Mount Fuji's Geology]]) *The [[Azores triple junction]] is a geologic triple junction where the boundaries of three tectonic plates intersect: the North American plate, the Eurasian plate and the African plate, R-R-R.<ref>{{Citation|last1=Carracedo|first1=Juan Carlos|title=North-East Atlantic Islands: The Macaronesian Archipelagos|date=2021-01-01|url=https://www.sciencedirect.com/science/article/pii/B9780081029084000278|encyclopedia=Encyclopedia of Geology (Second Edition)|pages=674–699|editor-last=Alderton|editor-first=David|place=Oxford|publisher=Academic Press|language=en|doi=10.1016/b978-0-08-102908-4.00027-8|isbn=978-0-08-102909-1|access-date=2021-03-18|last2=Troll|first2=Valentin R.|s2cid=226588940|editor2-last=Elias|editor2-first=Scott A.|url-access=subscription}}</ref> *The [[Boso triple junction]] offshore of Japan is a T-T-T triple junction between the [[Okhotsk microplate]], [[Pacific plate]] and [[Philippine Sea plate]]. *The [[North Sea]] is located at the extinct triple junction of three former continental plates of the [[Palaeozoic]] era: [[Avalonia]], [[Laurentia]] and [[Baltica]].<ref>{{cite journal|url=http://bullard.esc.cam.ac.uk/~basin/pubs/033.pdf|title=Subsidence analyses from the North Sea 'triple-junction'|first1=N.|last1=White|first2=D.|last2=Latin|year=1993|journal=Journal of the Geological Society|volume=150|number=3|pages=473–488|doi=10.1144/gsjgs.150.3.0473|bibcode=1993JGSoc.150..473W|s2cid=129832756|url-status=dead|archive-url=https://web.archive.org/web/20110812225718/http://bullard.esc.cam.ac.uk/~basin/pubs/033.pdf|archive-date=2011-08-12}}</ref> *The [[South Greenland triple junction]] was an R-R-R triple junction where the Eurasian, [[Greenland plate|Greenland]] and North American plates diverged during the [[Paleogene]].<ref>{{cite journal | last1 = Oakey | first1 = Gordon N. | last2 = Stephenson | first2 = Randell | title = Crustal structure of the Innuitian region of Arctic Canada and Greenland from gravity modelling: implications for the Palaeogene Eurekan orogen | journal = [[Geophysical Journal International]] | volume = 173 | page = 1041 | publisher = [[Royal Astronomical Society]] | year = 2008 | issue = 3 | doi = 10.1111/j.1365-246X.2008.03784.x | bibcode = 2008GeoJI.173.1039O | issn = 0956-540X | url = https://research.vu.nl/ws/files/2330136/209534.pdf | doi-access = free }}</ref> *The [[Chile triple junction]] is where the [[South American plate]], the [[Nazca plate]], and the [[Antarctic plate]] meet.
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