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===భూఖండాలు - ద్వీపాలు ===
[[File:South Tarawa from the air.jpg|thumb|కిర్బతీ రిపబ్లిక్కులో తర్వా అటాల్]]
▲The Pacific Ocean has most of the islands in the world. There are about 25,000 islands in the Pacific Ocean.<ref>{{cite web|last1=K|first1=Harsh|title=This ocean has most of the islands in the world|url=http://mysticalroads.com/pacific-ocean-facts/|website=Mysticalroads|accessdate=6 April 2017|date=19 March 2017|url-status=dead|archiveurl=https://web.archive.org/web/20170802153519/http://mysticalroads.com/pacific-ocean-facts/|archivedate=2 August 2017}}</ref><ref>{{cite book|last1=Ishihara|first1=Masahide|last2=Hoshino|first2=Eiichi|last3=Fujita|first3=Yoko|title=Self-determinable Development of Small Islands|date=2016|publisher=Springer|isbn=978-981-10-0132-1|page=180|url=https://books.google.com/books?id=3hNkDAAAQBAJ&pg=PA180|language=en}}</ref><ref>{{cite book|last1=United States. [[National Oceanic and Atmospheric Administration]]|last2=Western Pacific Regional Fishery Management Council|title=Toward an Ecosystem Approach for the Western Pacific Region: from Species-based Fishery Management Plans to Place-based Fishery Ecosystem Plans: Environmental Impact Statement|date=2009|publisher=Northwestern University|location=Evanston, IL|page=60|url=https://books.google.com/books?id=3Tw3AQAAMAAJ&pg=PA60|language=en|author2-link=Western Pacific Regional Fishery Management Council}}</ref> The islands entirely within the Pacific Ocean can be divided into three main groups known as [[Micronesia]], [[Melanesia]] and [[Polynesia]]. Micronesia, which lies north of the equator and west of the [[International Date Line]], includes the [[Mariana Islands]] in the northwest, the [[Caroline Islands]] in the center, the [[Marshall Islands]] to the east and the islands of [[Kiribati]] in the southeast.<ref name="AAE">{{cite book|title=Academic American encyclopedia|url=https://books.google.com/books?id=cF8NAQAAMAAJ|date=1997|publisher=Grolier Incorporated|isbn=978-0-7172-2068-7|page=8}}</ref><ref name="LalFortune2000p63">{{cite book|last1=Lal|first1=Brij Vilash|last2=Fortune|first2=Kate|title=The Pacific Islands: An Encyclopedia|url=https://books.google.com/books?id=T5pPpJl8E5wC&pg=PA63|date=2000|publisher=University of Hawaii Press|isbn=978-0-8248-2265-1|page=63}}</ref>
నైరుతి దిశలో ఉన్న మెలానేసియాలో న్యూజినియా పపంచంలో రెండవ అతిపెద్ద ద్వీపం (గ్రీన్లాండు తరువాత)గానూ పసిఫిక్ ద్వీపాలలో అతిపెద్దదిగానూ గుర్తించబడుతుంది. ఉత్తరం నుండి దక్షిణం మెలనేసియన్ సమూహాలు బిస్మార్కు ద్వీపసమూహం, సోలమన్ దీవులు, శాంటా క్రజ్, వనాటు, ఫిజి, న్యూ కాలెడోనియా వంటి ఇతర ద్వీపసమూహాలు ఉన్నాయి.<ref name="West2009">{{cite book|last=West|first=Barbara A.|title=Encyclopedia of the Peoples of Asia and Oceania|url=https://books.google.com/books?id=pCiNqFj3MQsC&pg=PA521|date=2009|publisher=Infobase Publishing|isbn=978-1-4381-1913-7|page=521}}</ref>
అతిపెద్ద ప్రాంతం అయిన పాలినేషియా ఉత్తరాన హవాయి నుండి దక్షిణాన న్యూజిలాండ్ వరకు విస్తరించి ఉంది. వీటి చుట్టూ తువాలు, టోకెలావ్, సమోవా, టోంగా, పశ్చిమాన కెర్మాడెక్ దీవులు, కుక్ దీవులు, సొసైటీ దీవులు, ఆస్ట్రేలియా ద్వీపాలు ఉన్నాయి. తూర్పున మార్క్వాస్ దీవులు, తుయామోటు, మంగరేవా దీవులు, ఈస్టర్ ద్వీపం ఉన్నాయి.<ref name="DunfordRidgell1996">{{cite book|last1=Dunford|first1=Betty|last2=Ridgell|first2=Reilly|title=Pacific Neighbors: The Islands of Micronesia, Melanesia, and Polynesia|url=https://books.google.com/books?id=3n2z7E1zH3MC|date=1996|publisher=Bess Press|isbn=978-1-57306-022-6|page=125}}</ref>
Islands in the Pacific Ocean are of four basic types: continental islands, high islands, coral reefs and uplifted coral platforms. Continental islands lie outside the andesite line and include New Guinea, the islands of New Zealand, and the Philippines. Some of these islands are structurally associated with nearby continents. High islands are of volcanic origin, and many contain active volcanoes. Among these are [[Bougainville Island|Bougainville]], Hawaii, and the Solomon Islands.<ref name="GillespieClague2009">{{cite book|last1=Gillespie|first1=Rosemary G.|last2=Clague|first2=David A.|title=Encyclopedia of Islands|url=https://books.google.com/books?id=g9ZogGs_fz8C&pg=PA706|date=2009|publisher=University of California Press|isbn=978-0-520-25649-1|page=706}}</ref>
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