Amami Ōshima ( 奄美大島 , Okinawan : Uushima ( ウーシマ ) ; Amami : Ushima ( ウシマ ) ) , also known as Amami , is the largest island in the Amami archipelago between Kyūshū and Okinawa . It is one of the Satsunan Islands .
67-640: The island, 712.35 km in area, has a population of approximately 73,000 people. Administratively it is divided into the city of Amami , the towns of Tatsugō , Setouchi , and the villages of Uken and Yamato in Kagoshima Prefecture . Much of the island is within the borders of the Amami Guntō National Park . In 2021, it was listed as part of the serial UNESCO World Heritage Site of Amami-Ōshima Island, Tokunoshima Island, northern part of Okinawa Island, and Iriomote Island . It
134-562: A memorial museum. After the Meiji Restoration Amami Ōshima was incorporated into Ōsumi Province and later became part of Kagoshima Prefecture. Following World War II , along with the other Amami Islands, it was occupied by the United States until 1953, at which time it reverted to the control of Japan. Since February 1974, a 7,861-hectare (19,420-acre) area that includes portions of the island and surrounding sea
201-527: A result of melting ice, the land has continued to rise yearly in Scandinavia, mostly in northern Sweden and Finland, where the land is rising at a rate of as much as 8–9 mm per year, or 1 m in 100 years. This is important for archaeologists, since a site that was coastal in the Nordic Stone Age now is inland and can be dated by its relative distance from the present shore. The term Würm
268-797: A still lesser extent, glaciers existed in Africa, for example in the High Atlas , the mountains of Morocco , the Mount Atakor massif in southern Algeria , and several mountains in Ethiopia . Just south of the equator, an ice cap of several hundred square kilometers was present on the east African mountains in the Kilimanjaro massif , Mount Kenya , and the Rwenzori Mountains , which still bear relic glaciers today. Glaciation of
335-462: A stopping place for envoys from Japan to the court of Tang dynasty China. Mother of pearl was an important export item to Japan. Between 1571 and 1611, Amami Ōshima was briefly incorporated as part of the Ryukyu Kingdom as it expanded northwards along the archipelago. As Ryukyu was a tributary vassal of Ming China, this changed the status of the island as well. To counter Ming authority,
402-604: Is also notable that North Pacific right whale , the most endangered of all whale species, have repeatedly appeared around the island (there are five records of three sightings, a capture, and a stranding since 1901) and as of 2014, Amami is the only location in East China Sea where this species has been confirmed in the past 110 years. It is also one of two locations in the world along with the Bonin Islands where constant appearance in winter has been confirmed since
469-605: Is derived from a river in the Alpine foreland, roughly marking the maximum glacier advance of this particular glacial period. The Alps were where the first systematic scientific research on ice ages was conducted by Louis Agassiz at the beginning of the 19th century. Here, the Würm glaciation of the LGP was intensively studied. Pollen analysis , the statistical analyses of microfossilized plant pollens found in geological deposits, chronicled
536-497: Is dyed with mud to create their characteristic black color. The port of Naze , located in the city of Amami is a major regional shipping and ferry hub. Amami Airport , located at the northern end of the island, is connected to Tokyo, Osaka, Naha , Fukuoka and Kagoshima as well as local flights to the other Amami Islands . There are bus routes and roads on the island. Two dialects of the Amami language are spoken in Amami Ōshima:
603-608: Is home to several rare or endangered endemic animals, including the Amami rabbit and the Lidth's jay , both of which are now found only in Amami Ōshima and Tokunoshima . The Amami rabbit is sometimes called a living fossil because it represents an ancient Asian lineage that has elsewhere disappeared. The island is also home to the habu , a venomous snake that can be found throughout the Ryūkyū Islands. Mongooses were introduced to kill
670-412: Is often colloquially referred to as the "last ice age", though the term ice age is not strictly defined, and on a longer geological perspective, the last few million years could be termed a single ice age given the continual presence of ice sheets near both poles. Glacials are somewhat better defined, as colder phases during which glaciers advance, separated by relatively warm interglacials . The end of
737-522: Is uncertain when Amami Ōshima was first settled. Stone tools indicate settlement in the Japanese Paleolithic period, and other artifacts, including pottery, indicate a constant contact with Jōmon , Yayoi and Kofun period Japan. The island is mentioned in the ancient Japanese chronicle Nihon Shoki in an entry for the year 657 AD. During the Nara period and early Heian period it was
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#1732791350759804-1024: The Central Rocky Mountains ), Wisconsinan or Wisconsin (in central North America), Devensian (in the British Isles), Midlandian (in Ireland), Würm (in the Alps ), Mérida (in Venezuela ), Weichselian or Vistulian (in Northern Europe and northern Central Europe), Valdai in Russia and Zyryanka in Siberia , Llanquihue in Chile , and Otira in New Zealand. The geochronological Late Pleistocene includes
871-496: The East China Sea on the west and the Pacific Ocean on the east. Amami Ōshima belongs to Kagoshima prefecture . It consists of the following municipalities. The climate of Amami Ōshima is classified as a humid subtropical climate ( Köppen climate classification Cfa ) with very warm summers and mild winters. The rainy season lasts from May through September. The island is subject to frequent typhoons . Amami Ōshima
938-670: The Himalayas , and other formerly glaciated regions around the world. The glaciations that occurred during this glacial period covered many areas, mainly in the Northern Hemisphere and to a lesser extent in the Southern Hemisphere. They have different names, historically developed and depending on their geographic distributions: Fraser (in the Pacific Cordillera of North America), Pinedale (in
1005-607: The Lesotho Highlands and parts of the Drakensberg . The development of glaciers was likely aided in part due to shade provided by adjacent cliffs. Various moraines and former glacial niches have been identified in the eastern Lesotho Highlands a few kilometres west of the Great Escarpment , at altitudes greater than 3,000 m on south-facing slopes. Studies suggest that the annual average temperature in
1072-727: The Owen Stanley Range , and the Saruwaged Range . Mount Giluwe in the Central Cordillera had a "more or less continuous ice cap covering about 188 km and extending down to 3200-3500 m". In Western New Guinea , remnants of these glaciers are still preserved atop Puncak Jaya and Ngga Pilimsit . Small glaciers developed in a few favorable places in Southern Africa during the last glacial period. These small glaciers would have been located in
1139-559: The Quaternary glaciation which started around 2,588,000 years ago and is ongoing. The glaciation and the current Quaternary Period both began with the formation of the Arctic ice cap . The Antarctic ice sheet began to form earlier, at about 34 Mya, in the mid- Cenozoic ( Eocene–Oligocene extinction event ), and the term Late Cenozoic Ice Age is used to include this early phase with the current glaciation. The previous ice age within
1206-720: The Sierra Nevada in northern California . In northern Eurasia, the Scandinavian ice sheet once again reached the northern parts of the British Isles , Germany , Poland , and Russia, extending as far east as the Taymyr Peninsula in western Siberia. The maximum extent of western Siberian glaciation was reached by about 18,000 to 17,000 BP, later than in Europe (22,000–18,000 BP). Northeastern Siberia
1273-732: The Upper Mississippi River , which in turn was formed during an earlier glacial period. In its retreat, the Wisconsin episode glaciation left terminal moraines that form Long Island , Block Island , Cape Cod , Nomans Land , Martha's Vineyard , Nantucket , Sable Island , and the Oak Ridges Moraine in south-central Ontario, Canada. In Wisconsin itself, it left the Kettle Moraine . The drumlins and eskers formed at its melting edge are landmarks of
1340-584: The grooves left by these glaciers can be easily observed. In southwestern Saskatchewan and southeastern Alberta, a suture zone between the Laurentide and Cordilleran ice sheets formed the Cypress Hills , which is the northernmost point in North America that remained south of the continental ice sheets. The Great Lakes are the result of glacial scour and pooling of meltwater at the rim of
1407-586: The isostatically depressed area, a temporary marine incursion that geologists dub the Yoldia Sea . Then, as postglacial isostatic rebound lifted the region about 9500 BP, the deepest basin of the Baltic became a freshwater lake, in palaeological contexts referred to as Ancylus Lake , which is identifiable in the freshwater fauna found in sediment cores. The lake was filled by glacial runoff, but as worldwide sea level continued rising, saltwater again breached
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#17327913507591474-504: The 20th and into the 21st century. Amami Oshima is the only place where a nesting of leatherback turtle has been seen in Japan. Amami Oshima had a population of 73,000 people in 2013. 44,561 people live in the city of Amami . The total area of Amami city is 308.15 km with a population density of 145 persons per km. The economy of Amami Ōshima is based on agriculture ( sugar cane , rice and sweet potatoes ), commercial fishing , and
1541-502: The 20th century. Discovery of Indo-Pacific bottlenose dolphins in Seto strait made it the first confirmation in the nation. Other species include whales ( Bryde's , sperm ), smaller whales or dolphins ( false killer , spinner , spotted ), and so on. Before being wiped out, many large whales such as blue and fin were seasonal migrants. The island marks the northernmost limit of dugong distribution, with occasional sightings throughout
1608-778: The Alpine foreland . Local ice fields or small ice sheets could be found capping the highest massifs of the Pyrenees , the Carpathian Mountains , the Balkan Mountains , the Caucasus , and the mountains of Turkey and Iran . In the Himalayas and the Tibetan Plateau , there is evidence that glaciers advanced considerably, particularly between 47,000 and 27,000 BP, but the exact ages, as well as
1675-745: The Center for Arctic Gas Hydrate, Environment and Climate at the University of Tromsø , published a study in June 2017 describing over a hundred ocean sediment craters, some 3,000 m wide and up to 300 m deep, formed by explosive eruptions of methane from destabilized methane hydrates , following ice-sheet retreat during the LGP, around 12,000 years ago. These areas around the Barents Sea still seep methane today. The study hypothesized that existing bulges containing methane reservoirs could eventually have
1742-598: The Greenland climate was dry during the LGP, with precipitation reaching perhaps only 20% of today's value. The name Mérida glaciation is proposed to designate the alpine glaciation that affected the central Venezuelan Andes during the Late Pleistocene. Two main moraine levels have been recognized - one with an elevation of 2,600–2,700 m (8,500–8,900 ft), and another with an elevation of 3,000–3,500 m (9,800–11,500 ft). The snow line during
1809-1010: The LGP as the Devensian . Irish geologists, geographers, and archaeologists refer to the Midlandian glaciation, as its effects in Ireland are largely visible in the Irish Midlands . The name Devensian is derived from the Latin Dēvenses , people living by the Dee ( Dēva in Latin), a river on the Welsh border near which deposits from the period are particularly well represented. The effects of this glaciation can be seen in many geological features of England, Wales, Scotland, and Northern Ireland . Its deposits have been found overlying material from
1876-868: The North American Laurentide ice sheet. At the height of glaciation, the Bering land bridge potentially permitted migration of mammals, including people, to North America from Siberia . It radically altered the geography of North America north of the Ohio River . At the height of the Wisconsin episode glaciation, ice covered most of Canada, the Upper Midwest , and New England , as well as parts of Montana and Washington . On Kelleys Island in Lake Erie or in New York's Central Park ,
1943-562: The North Korean vessel. In 2017 the Amami Guntō National Park was established. It absorbed the former Amami Gunto Quasi-national Park and other land and sea areas in adjacent municipalities . Amami Ōshima is the seventh-largest island in the Japanese archipelago after the four main islands, Okinawa Island and Sado Island (excluding the disputed Kuril Islands ). It is located approximately 380 kilometres (210 nmi) south of
2010-617: The Northern Ōshima dialect and the Southern Ōshima dialect. These dialects are part of the Ryukyuan languages group. According to Ethnologue , as of 2005 there were about 10,000 speakers of the Northern Ōshima dialect and about 1,800 speakers of the Southern Ōshima dialect. These dialects are now spoken mostly by older residents of the island, while most of the younger generations are monolingual in Japanese . The Amami language, including
2077-594: The Polish River Vistula or its German name Weichsel). Evidence suggests that the ice sheets were at their maximum size for only a short period, between 25,000 and 13,000 BP. Eight interstadials have been recognized in the Weichselian, including the Oerel, Glinde, Moershoofd, Hengelo, and Denekamp. Correlation with isotope stages is still in process. During the glacial maximum in Scandinavia, only
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2144-696: The Quaternary is the Penultimate Glacial Period , which ended about 128,000 years ago, was more severe than the Last Glacial Period in some areas such as Britain, but less severe in others. The last glacial period saw alternating episodes of glacier advance and retreat with the Last Glacial Maximum occurring between 26,000 and 20,000 years ago. While the general pattern of cooling and glacier advance around
2211-437: The Southern Hemisphere was less extensive. Ice sheets existed in the Andes ( Patagonian Ice Sheet ), where six glacier advances between 33,500 and 13,900 BP in the Chilean Andes have been reported. Antarctica was entirely glaciated, much like today, but unlike today the ice sheet left no uncovered area. In mainland Australia only a very small area in the vicinity of Mount Kosciuszko was glaciated, whereas in Tasmania glaciation
2278-452: The Wisconsin episode. It began about 30,000 years ago, reached its greatest advance 21,000 years ago, and ended about 10,000 years ago. In northwest Greenland, ice coverage attained a very early maximum in the LGP around 114,000. After this early maximum, ice coverage was similar to today until the end of the last glacial period. Towards the end, glaciers advanced once more before retreating to their present extent. According to ice core data,
2345-423: The administration of the United States from July 1, 1946, to December 25, 1953. It was elevated to city status on July 1, 1946. The modern city of Amami was established on March 20, 2006, from the merger of the city of Naze, the town of Kasari , and the village of Sumiyō (both from Ōshima District ). Amami is bordered by the East China Sea to the north and the Pacific Ocean to the south. The Kasari area of
2412-509: The city is an exclave, separated from the main part of Amami by the town of Tatsugō . Amami has a humid subtropical climate ( Köppen climate classification Cfa ) with long, hot, humid summers and mild winters. Precipitation is abundant throughout the year, with particularly heavy rainfall in May, June, August and September. The area is subject to frequent typhoons . Naze Port is a regional transportation hub, with frequent ferry service to Kagoshima, Tokyo, Kobe, and Osaka, as well as Okinawa,
2479-421: The distillation of shōchū . The favorable climate allows for two rice crops a year. Seasonal tourism is also an important part of the economy. Traditional crafts on the island include the production of high quality hand-crafted silk called Ōshima-tsumugi which is mainly used to make kimono . Along with Persian carpets and Gobelin tapestries, is said to be one of the world's three great textiles. Ōshima-tsumugi
2546-400: The dramatic changes in the European environment during the Würm glaciation. During the height of Würm glaciation, c. 24,000 – c. 10,000 BP, most of western and central Europe and Eurasia was open steppe-tundra, while the Alps presented solid ice fields and montane glaciers. Scandinavia and much of Britain were under ice. During the Würm, the Rhône Glacier covered
2613-423: The formation of a single contiguous ice sheet on the Tibetan Plateau, is controversial. Other areas of the Northern Hemisphere did not bear extensive ice sheets, but local glaciers were widespread at high altitudes. Parts of Taiwan , for example, were repeatedly glaciated between 44,250 and 10,680 BP as well as the Japanese Alps . In both areas, maximum glacier advance occurred between 60,000 and 30,000 BP. To
2680-414: The globe was similar, local differences make it difficult to compare the details from continent to continent (see picture of ice core data below for differences). The most recent cooling, the Younger Dryas , began around 12,800 years ago and ended around 11,700 years ago, also marking the end of the LGP and the Pleistocene epoch. It was followed by the Holocene , the current geological epoch . The LGP
2747-440: The habu, but have become another problem, as an increase in the mongoose population has been linked to the decline of the Amami rabbit and other endemic species. After the mongoose population reached 10,000 by 2000, authorities launched an eradication campaign that led to the complete eradication of mongoose on the island by 2024. Whale watching to see humpback whales has become a featured attraction in winter in recent years. It
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2814-456: The island was invaded by samurai from Shimazu clan in 1609 and its incorporation into the official holdings of that domain was recognized by the Tokugawa shogunate in 1624. Shimazu rule was harsh, with the inhabitants of the island reduced to serfdom and forced to raise sugar cane to meet high taxation, which often resulted in famine. Saigō Takamori was exiled to Amami Ōshima in 1859, staying for two years, and his house has been preserved as
2881-447: The last glacial advance was lowered approximately 1,200 m (3,900 ft) below the present snow line, which is 3,700 m (12,100 ft). The glaciated area in the Cordillera de Mérida was about 600 km (230 sq mi); this included these high areas, from southwest to northeast: Páramo de Tamá, Páramo Batallón, Páramo Los Conejos, Páramo Piedras Blancas, and Teta de Niquitao. Around 200 km (77 sq mi) of
2948-444: The last glacial maximum, the Patagonian ice sheet extended over the Andes from about 35°S to Tierra del Fuego at 55°S. The western part appears to have been very active, with wet basal conditions, while the eastern part was cold-based. Cryogenic features such as ice wedges , patterned ground , pingos , rock glaciers , palsas , soil cryoturbation , and solifluction deposits developed in unglaciated extra-Andean Patagonia during
3015-401: The last glacial period, which was about 10,000 years ago, is often called the end of the ice age, although extensive year-round ice persists in Antarctica and Greenland . Over the past few million years, the glacial-interglacial cycles have been "paced" by periodic variations in the Earth's orbit via Milankovitch cycles . The LGP has been intensively studied in North America, northern Eurasia,
3082-442: The late glacial (Weichselian) and the immediately preceding penultimate interglacial ( Eemian ) period. Canada was almost completely covered by ice, as was the northern part of the United States , both blanketed by the huge Laurentide Ice Sheet . Alaska remained mostly ice free due to arid climate conditions. Local glaciations existed in the Rocky Mountains and the Cordilleran ice sheet and as ice fields and ice caps in
3149-401: The lower Connecticut River Valley . In the Sierra Nevada , three stages of glacial maxima, sometimes incorrectly called ice ages , were separated by warmer periods. These glacial maxima are called, from oldest to youngest, Tahoe, Tenaya, and Tioga. The Tahoe reached its maximum extent perhaps about 70,000 years ago. Little is known about the Tenaya. The Tioga was the least severe and last of
3216-448: The main Wisconsin glacial advance. The upper level probably represents the last glacial advance (Late Wisconsin). The Llanquihue glaciation takes its name from Llanquihue Lake in southern Chile , which is a fan-shaped piedmont glacial lake. On the lake's western shores, large moraine systems occur, of which the innermost belong to the LGP. Llanquihue Lake's varves are a node point in southern Chile's varve geochronology . During
3283-430: The massive Missoula Floods . USGS geologists estimate that the cycle of flooding and reformation of the lake lasted an average of 55 years and that the floods occurred about 40 times over the 2,000-year period starting 15,000 years ago. Glacial lake outburst floods such as these are not uncommon today in Iceland and other places. The Wisconsin glacial episode was the last major advance of continental glaciers in
3350-502: The mountains of Southern Africa was about 6 °C colder than at present, in line with temperature drops estimated for Tasmania and southern Patagonia during the same time. This resulted in an environment of relatively arid periglaciation without permafrost , but with deep seasonal freezing on south-facing slopes. Periglaciation in the eastern Drakensberg and Lesotho Highlands produced solifluction deposits and blockfields ; including blockstreams and stone garlands. Scientists from
3417-409: The municipality as well as the island's main port is a small city also known as Naze . As of 1 October 2020, the city has an estimated population of 41,390 and a population density of 134 persons per km . The total area is 308.15 km . The village of Naze was established on April 1, 1908. It was elevated to town status on October 1, 1922. As with all of the Amami Islands, the village came under
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#17327913507593484-456: The other Amami islands, and Tokara Islands . Last Glacial Period The Last Glacial Period ( LGP ), also known as the Last glacial cycle , occurred from the end of the Last Interglacial to the beginning of the Holocene , c. 115,000 – c. 11,700 years ago, and thus corresponds to most of the timespan of the Late Pleistocene . The LGP is part of a larger sequence of glacial and interglacial periods known as
3551-463: The preceding Ipswichian stage and lying beneath those from the following Holocene , which is the current stage. This is sometimes called the Flandrian interglacial in Britain. The latter part of the Devensian includes pollen zones I–IV, the Allerød oscillation and Bølling oscillation , and the Oldest Dryas , Older Dryas , and Younger Dryas cold periods. Alternative names include Weichsel glaciation or Vistulian glaciation (referring to
3618-430: The proglacial rivers' shifting and redepositing gravels. Beneath the surface, they had profound and lasting influence on geothermal heat and the patterns of deep groundwater flow. The Pinedale (central Rocky Mountains) or Fraser (Cordilleran ice sheet) glaciation was the last of the major glaciations to appear in the Rocky Mountains in the United States. The Pinedale lasted from around 30,000 to 10,000 years ago, and
3685-410: The receding ice. When the enormous mass of the continental ice sheet retreated, the Great Lakes began gradually moving south due to isostatic rebound of the north shore. Niagara Falls is also a product of the glaciation, as is the course of the Ohio River, which largely supplanted the prior Teays River . With the assistance of several very broad glacial lakes, it released floods through the gorge of
3752-399: The same fate. During the last glacial period, Antarctica was blanketed by a massive ice sheet, much as it is today. The ice covered all land areas and extended into the ocean onto the middle and outer continental shelf. Counterintuitively though, according to ice modeling done in 2002, ice over central East Antarctica was generally thinner than it is today. British geologists refer to
3819-413: The sill about 8000 BP, forming a marine Littorina Sea , which was followed by another freshwater phase before the present brackish marine system was established. "At its present state of development, the marine life of the Baltic Sea is less than about 4000 years old", Drs. Thulin and Andrushaitis remarked when reviewing these sequences in 2003. Overlying ice had exerted pressure on the Earth's surface. As
3886-399: The southern tip of Kyūshū and 250 kilometres (130 nmi) north of Okinawa . The island is of volcanic origin, with Mount Yuwanda at 605 metres (1,985 ft) above sea level at its highest peak. The coast of the island is surrounded by a coral reef , and the island may also have been home to some of the northernmost coral reefs in Japan during the last glacial period . It is surrounded by
3953-428: The surrounding ice sheets. According to the sediment composition retrieved from deep-sea cores , even times of seasonally open waters must have occurred. Outside the main ice sheets, widespread glaciation occurred on the highest mountains of the Alpide belt . In contrast to the earlier glacial stages, the Würm glaciation was composed of smaller ice caps and mostly confined to valley glaciers, sending glacial lobes into
4020-447: The total glaciated area was in the Sierra Nevada de Mérida , and of that amount, the largest concentration, 50 km (19 sq mi), was in the areas of Pico Bolívar , Pico Humboldt [4,942 m (16,214 ft)], and Pico Bonpland [4,983 m (16,348 ft)]. Radiocarbon dating indicates that the moraines are older than 10,000 BP, and probably older than 13,000 BP. The lower moraine level probably corresponds to
4087-435: The western parts of Jutland were ice-free, and a large part of what is today the North Sea was dry land connecting Jutland with Britain (see Doggerland ). The Baltic Sea , with its unique brackish water , is a result of meltwater from the Weichsel glaciation combining with saltwater from the North Sea when the straits between Sweden and Denmark opened. Initially, when the ice began melting about 10,300 BP, seawater filled
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#17327913507594154-523: The whole western Swiss plateau, reaching today's regions of Solothurn and Aargau. In the region of Bern, it merged with the Aar glacier. The Rhine Glacier is currently the subject of the most detailed studies. Glaciers of the Reuss and the Limmat advanced sometimes as far as the Jura. Montane and piedmont glaciers formed the land by grinding away virtually all traces of the older Günz and Mindel glaciation, by depositing base moraines and terminal moraines of different retraction phases and loess deposits, and by
4221-404: The Ōshima dialects, is classified as endangered by UNESCO . There is also a village sign language , named as Amami Oshima Sign Language , being used in the area. Amami, Kagoshima Amami ( 奄美市 , Amami-shi ) is a city located on the island of Amami Ōshima , in Kagoshima Prefecture , Japan . Amami is the most populated municipality on Amami Ōshima. The most urban part of
4288-404: Was at its greatest extent between 23,500 and 21,000 years ago. This glaciation was somewhat distinct from the main Wisconsin glaciation, as it was only loosely related to the giant ice sheets and was instead composed of mountain glaciers, merging into the Cordilleran ice sheet. The Cordilleran ice sheet produced features such as glacial Lake Missoula , which broke free from its ice dam, causing
4355-405: Was more widespread. An ice sheet formed in New Zealand, covering all of the Southern Alps, where at least three glacial advances can be distinguished. Local ice caps existed in the highest mountains of the island of New Guinea , where temperatures were 5 to 6 °C colder than at present. The main areas of Papua New Guinea where glaciers developed during the LGP were the Central Cordillera ,
4422-432: Was not covered by a continental-scale ice sheet. Instead, large, but restricted, icefield complexes covered mountain ranges within northeast Siberia, including the Kamchatka-Koryak Mountains. The Arctic Ocean between the huge ice sheets of America and Eurasia was not frozen throughout, but like today, probably was covered only by relatively shallow ice, subject to seasonal changes and riddled with icebergs calving from
4489-400: Was protected as the Amami Gunto Quasi-national Park. The area also has a large mangrove forest. In December 2001 there was a naval battle called the Battle of Amami-Ōshima between an armed North Korean spy craft and Japanese Coast Guard ships near Amami Ōshima. The spy craft violated the Exclusive economic zone of Japan . This was a six-hour confrontation that ended with the sinking of
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