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(Redirected from Subcontinents)
For other uses, see Continent (disambiguation).

Animated, colour-coded map showing some continents and the region of Oceania (purple), which includes the continent of Australia. Depending on the convention and model, some continents may be consolidated or subdivided.

A continent is any of several large geographical regions. Continents are generally identified by convention rather than any strict criteria. A continent could be a single landmass or a part of a very large landmass, as in the case of Asia or Europe. Due to this, the number of continents varies; up to seven or as few as four geographical regions are commonly regarded as continents. Most English-speaking countries recognize seven regions as continents. In order from largest to smallest in area, these seven regions are Asia, Africa, North America, South America, Antarctica, Europe, and Australia.[1] Different variations with fewer continents merge some of these regions; examples of this are merging North America and South America into America, Asia and Europe into Eurasia, and Africa, Asia, and Europe into Afro-Eurasia.

Oceanic islands are occasionally grouped with a nearby continent to divide all the world's land into geographical regions. Under this scheme, most of the island countries and territories in the Pacific Ocean are grouped together with the continent of Australia to form the geographical region Oceania.[2]

In geology, a continent is defined as "one of Earth's major landmasses, including both dry land and continental shelves".[3] The geological continents correspond to seven large areas of continental crust that are found on the tectonic plates, but exclude small continental fragments such as Madagascar that are generally referred to as microcontinents. Continental crust is only known to exist on Earth.[4]

The idea of continental drift gained recognition in the 20th century. It postulates that the current continents formed from the breaking up of a supercontinent (Pangaea) that formed hundreds of millions of years ago.

Etymology

From the 16th century the English noun continent was derived from the term continent land, meaning continuous or connected land[5] and translated from the Latin terra continens.[6] The noun was used to mean "a connected or continuous tract of land" or mainland.[5] It was not applied only to very large areas of land—in the 17th century, references were made to the continents (or mainlands) of the Isle of Man, Ireland and Wales and in 1745 to Sumatra.[5] The word continent was used in translating Greek and Latin writings about the three "parts" of the world, although in the original languages no word of exactly the same meaning as continent was used.[7]

While continent was used on the one hand for relatively small areas of continuous land, on the other hand geographers again raised Herodotus's query about why a single large landmass should be divided into separate continents. In the mid-17th century, Peter Heylin wrote in his Cosmographie that "A Continent is a great quantity of Land, not separated by any Sea from the rest of the World, as the whole Continent of Europe, Asia, Africa." In 1727, Ephraim Chambers wrote in his Cyclopædia, "The world is ordinarily divided into two grand continents: the Old and the New." And in his 1752 atlas, Emanuel Bowen defined a continent as "a large space of dry land comprehending many countries all joined together, without any separation by water. Thus Europe, Asia, and Africa is one great continent, as America is another."[8] However, the old idea of Europe, Asia and Africa as "parts" of the world ultimately persisted with these being regarded as separate continents.

Definitions and application

Further information: Island § Differentiation from continents

By convention, continents "are understood to be large, continuous, discrete masses of land, ideally separated by expanses of water".[9] In modern schemes with five or more recognized continents, at least one pair of continents is joined by land in some fashion. The criterion "large" leads to arbitrary classification: Greenland, with a surface area of 2,166,086 square kilometres (836,330 sq mi), is only considered the world's largest island, while Australia, at 7,617,930 square kilometres (2,941,300 sq mi), is deemed the smallest continent.

Earth's major landmasses all have coasts on a single, continuous World Ocean, which is divided into several principal oceanic components by the continents and various geographic criteria.[10][11]

The geological definition of a continent has four criteria: high elevation relative to the ocean floor; a wide range of igneous, metamorphic and sedimentary rocks rich in silica; a crust thicker than the surrounding oceanic crust; and well-defined limits around a large enough area.[12]

Extent

The most restricted meaning of continent is that of a continuous[13][non-tertiary source needed] area of land or mainland, with the coastline and any land boundaries forming the edge of the continent. In this sense, the term continental Europe (sometimes referred to in Britain as "the Continent") is used to refer to mainland Europe, excluding islands such as Great Britain, Iceland, Ireland, and Malta, while the term continent of Australia may refer to the mainland of Australia, excluding New Guinea, Tasmania, and other nearby islands. Similarly, the continental United States refers to "the 49 States (including Alaska but excluding Hawaii) located on the continent of North America, and the District of Columbia."[14]

From the perspective of geology or physical geography, continent may be extended beyond the confines of continuous dry land to include the shallow, submerged adjacent area (the continental shelf)[15] and the islands on the shelf (continental islands), as they are structurally part of the continent.[16]

From this perspective, the edge of the continental shelf is the true edge of the continent, as shorelines vary with changes in sea level.[17] In this sense the islands of Great Britain and Ireland are part of Europe, while Australia and the island of New Guinea together form a continent. Taken to its limit, this view could support the view that there are only three continents: Antarctica, Australia-New Guinea, and a single mega-continent which joins Afro-Eurasia and America via the contiguous continental shelf in and around the Bering Sea. The vast size of the latter compared to the first two might even lead some to say it is the only continent, the others being more comparable to Greenland or New Zealand.[18]

Map of island nations depicting sovereign states and a de facto state (Taiwan) (tw). Those with land borders are shaded green, and those without shaded blue. Along with dependent or disputed island territories, which do not appear on the map, these states are often grouped geographically with a neighboring continental landmass.

As a cultural construct, the concept of a continent may go beyond the continental shelf to include oceanic islands and continental fragments. In this way, Iceland is considered a part of Europe, and Madagascar a part of Africa. Extrapolating the concept to its extreme, some geographers group the Australian continental landmass with other islands in the Pacific Ocean into Oceania, which is usually considered a region rather than a continent. This divides the entire land surface of Earth into continents, regions, or quasi-continents.[19]

Separation

Main article: Boundaries between the continents
See also: List of transcontinental countries

The criterion that each continent is a discrete landmass is commonly relaxed due to historical conventions and practical use. Of the seven most globally recognized continents, only Antarctica and Australia are completely separated from other continents by the ocean. Several continents are defined not as absolutely distinct bodies but as "more or less discrete masses of land".[20] Africa and Asia are joined by the Isthmus of Suez, and North America and South America by the Isthmus of Panama. In both cases, there is no complete separation of these landmasses by water (disregarding the Suez Canal and the Panama Canal, which are both narrow and shallow, as well as human-made). Both of these isthmuses are very narrow compared to the bulk of the landmasses they unite.

North America and South America are treated as separate continents in the seven-continent model. However, they may also be viewed as a single continent known as America. This viewpoint was common in the United States until World War II, and remains prevalent in some Asian six-continent models.[21] The single American continent model remains a common view in European countries like France, Greece, Hungary, Italy, Malta, Portugal, Spain, Latin American countries and some Asian countries.

The criterion of a discrete landmass is completely disregarded if the continuous landmass of Eurasia is classified as two separate continents (Asia and Europe). Physiographically, Europe and the Indian subcontinent are large peninsulas of the Eurasian landmass. However, Europe is considered a continent with its comparatively large land area of 10,180,000 square kilometres (3,930,000 sq mi), while the Indian subcontinent, with less than half that area, is considered a subcontinent. The alternative view—in geology and geography—that Eurasia is a single continent results in a six-continent view of the world. Some view the separation of Eurasia into Asia and Europe as a residue of Eurocentrism: "In physical, cultural and historical diversity, China and India are comparable to the entire European landmass, not to a single European country. [...]."[22] However, for historical and cultural reasons, the view of Europe as a separate continent continues in almost all categorizations.

If continents are defined strictly as discrete landmasses, embracing all the contiguous land of a body, then Africa, Asia, and Europe form a single continent which may be referred to as Afro-Eurasia.[23] Combined with the consolidation of the Americas, this would produce a four-continent model consisting of Afro-Eurasia, America, Antarctica, and Australia.

When sea levels were lower during the Pleistocene ice ages, greater areas of the continental shelf were exposed as dry land, forming land bridges between Tasmania and the Australian mainland.[24] At those times, Australia and New Guinea were a single, continuous continent known as Sahul. Likewise, Afro-Eurasia and the Americas were joined by the Bering Land Bridge. Other islands, such as Great Britain, were joined to the mainlands of their continents. At that time, there were just three discrete landmasses in the world: Africa-Eurasia-America, Antarctica, and Australia-New Guinea (Sahul).

Number

There are several ways of distinguishing the continents:

Color-coded map showing the various continents.
Similar shades exhibit areas that may be consolidated or subdivided.
Number Continents Sources Comment
Four     Afro-Eurasia (Old World or World Island)    America (New World)   Antarctica   Australia [25][26][27][28][29][30][31][32] Continuous landmasses
Five   Africa    Eurasia    America   Antarctica   Australia [33][34][35] Physiographic regions
Six   Africa    Eurasia   North America   South America   Antarctica   Australia [36][37] Geological continents
  Africa   Asia   Europe    America   Antarctica   Australia [38] UNSD continental regions
Seven   Africa   Asia   Europe   North America   South America   Antarctica   Australia [36][39][40][41][42][43] "Parts" of the world

In the English-speaking countries, geographers often use the term Oceania to denote a geographical region which includes most of the island countries and territories in the Pacific Ocean, as well as the continent of Australia.[49]

Eighth continent

Zealandia (a submerged continent) has been called the eighth continent.[50]

Area and population

For a more detailed list of populations by continental regions and subregions, see List of continents and continental subregions by population.

The following table provides areas given by Encyclopædia Britannica for each continent in accordance with the seven-continent model, including Australasia along with Melanesia, Micronesia, and Polynesia as parts of Oceania. It also provides populations of continents according to 2021 estimates by the United Nations Statistics Division based on the United Nations geoscheme, which includes all of Egypt (including the Isthmus of Suez and the Sinai Peninsula) as a part of Africa, all of Armenia, Azerbaijan, Cyprus, Georgia, Indonesia, Kazakhstan, and Turkey (including East Thrace) as parts of Asia, all of Russia (including Siberia) as a part of Europe, all of Panama and the United States (including Hawaii) as parts of North America, and all of Chile (including Easter Island) as a part of South America.

Land areas[51][52][53][54][55][56][57][58] and population estimates[59][60]
Continent Land area Population
km2 sq mi % of
world 		2021
(estimate) 		% of
world
Earth 149,733,926 57,812,592 100.0 7,909,295,151 100.0
Asia 44,614,000 17,226,000 29.8 4,694,576,167 59.4
Africa 30,365,000 11,724,000 20.3 1,393,676,444 17.6
North America 24,230,000 9,360,000 16.2 595,783,465 7.5
South America 17,814,000 6,878,000 11.9 434,254,119 5.5
Antarctica 14,200,000 5,500,000 9.5 0 0
Europe 10,000,000 3,900,000 6.7 745,173,774 9.4
Oceania[α] 8,510,926 3,286,087 5.7 44,491,724 0.6
  1. ^ Not usually considered a continent in the English-speaking world. Its land area includes Australia and New Zealand but excludes Western New Guinea and the Aru Islands.

Other divisions

Supercontinents

Main article: Supercontinent
Further information: Geological history of Earth
Reconstruction of the supercontinent Pangaea approximately 200 million years ago

Apart from the current continents, the scope and meaning of the term continent includes past geological ones. Supercontinents, largely in evidence earlier in the geological record, are landmasses that comprise most of the world's cratons or continental cores.[61] These have included Vaalbara, Kenorland, Columbia, Rodinia, Pannotia, and Pangaea. Over time, these supercontinents broke apart into large landmasses which formed the present continents.

Subcontinents

Further information: Indian subcontinent and Arabian Peninsula
The Indian subcontinent

Certain parts of continents are recognized as subcontinents, especially the large peninsulas separated from the main continental landmass by geographical features. The most widely recognized example is the Indian subcontinent.[62] The Arabian Peninsula, Southern Africa, the Southern Cone of South America, and Alaska in North America might be considered further examples.[62][63]

In many of these cases, the "subcontinents" concerned are on different tectonic plates from the rest of the continent, providing a geological justification for the terminology.[64] Greenland, generally considered the world's largest island on the northeastern periphery of the North American Plate, is sometimes referred to as a subcontinent.[65][66] This is a significant departure from the more conventional view of a subcontinent as comprising a very large peninsula on the fringe of a continent.[62]

Where the Americas are viewed as a single continent (America), it is divided into two subcontinents (North America and South America)[67][68][69] or three (Central America being the third).[70][71] When Eurasia is regarded as a single continent, Asia and Europe are treated as subcontinents.[62]

Submerged continents

Main article: Submerged continent
Further information: List of lost lands
Zealandia, the largest submerged landmass or continent

Some areas of continental crust are largely covered by the ocean and may be considered submerged continents. Notable examples are Zealandia, emerging from the ocean primarily in New Zealand and New Caledonia,[72][non-tertiary source needed] and the almost completely submerged Kerguelen Plateau in the southern Indian Ocean.[73]

Microcontinents

Further information: Continental fragment
See also: Madagascar

Some islands lie on sections of continental crust that have rifted and drifted apart from a main continental landmass. While not considered continents because of their relatively small size, they may be considered microcontinents. Madagascar, the largest example, is usually considered an island of Africa, but its divergent evolution has caused it to be referred to as "the eighth continent" from a biological perspective.[74]

Geological continents

See also: Zealandia

Geologists use four key attributes to define a continent:[75]

  1. Elevation – The landmass, whether dry or submerged beneath the ocean, should be elevated above the surrounding ocean crust.
  2. Geology – The landmass should contain different types of rock: igneous, metamorphic, and sedimentary.
  3. Crustal structure – The landmass should consist of the continental crust, which is thicker and has a lower seismic velocity than the oceanic crust.
  4. Limits and area – The landmass should have clearly-defined boundaries and an area of more than one million square kilometres.[a]

With the addition of Zealandia in 2017, Earth currently has seven recognized geological continents:

Due to a seeming lack of Precambrian cratonic rocks, Zealandia's status as a geological continent has been disputed by some geologists.[77] However, a study conducted in 2021 found that part of the submerged continent is indeed Precambrian, twice as old as geologists had previously thought, which is further evidence that supports the idea of Zealandia being a geological continent.[78][79]

All seven geological continents are spatially isolated by geologic features.[80]

History of the concept

Early concepts of the Old World continents

The Ancient Greek geographer Strabo holding a globe showing Europa and Asia

The term "continent" translates the Greek word ἤπειρος, meaning "landmass, terra firma", the proper name of Epirus and later especially used for Asia (i.e. Asia Minor).[81]

The first distinction between continents was made by ancient Greek mariners who gave the names Europe and Asia to the lands on either side of the waterways of the Aegean Sea, the Dardanelles strait, the Sea of Marmara, the Bosporus strait and the Black Sea.[82] The names were first applied just to lands near the coast and only later extended to include the hinterlands.[83][84] But the division was only carried through to the end of navigable waterways and "... beyond that point the Hellenic geographers never succeeded in laying their finger on any inland feature in the physical landscape that could offer any convincing line for partitioning an indivisible Eurasia ..."[82]

Ancient Greek thinkers subsequently debated whether Africa (then called Libya) should be considered part of Asia or a third part of the world. Division into three parts eventually came to predominate.[85] From the Greek viewpoint, the Aegean Sea was the center of the world; Asia lay to the east, Europe to the north and west, and Africa to the south.[86] The boundaries between the continents were not fixed. Early on, the Europe–Asia boundary was taken to run from the Black Sea along the Rioni River (known then as the Phasis) in Georgia. Later it was viewed as running from the Black Sea through Kerch Strait, the Sea of Azov and along the Don River (known then as the Tanais) in Russia.[87] The boundary between Asia and Africa was generally taken to be the Nile River. Herodotus[88] in the 5th century BCE objected to the whole of Egypt being split between Asia and Africa ("Libya") and took the boundary to lie along the western border of Egypt, regarding Egypt as part of Asia.[89][90][91][92] He also questioned the division into three of what is really a single landmass,[93] a debate that continues nearly two and a half millennia later. Herodotus believed Europe to be larger (at least in width) than the other two continents:

I wonder, then, at those who have mapped out and divided the world into Libya, Asia, and Europe; for the difference between them is great, seeing that in length Europe stretches along both the others together, and it appears to me to be wider beyond all comparison.[94]

Eratosthenes, in the 3rd century BCE, noted that some geographers divided the continents by rivers (the Nile and the Don), thus considering them "islands". Others divided the continents by isthmuses, calling the continents "peninsulas". These latter geographers set the border between Europe and Asia at the isthmus between the Black Sea and the Caspian Sea, and the border between Asia and Africa at the isthmus between the Red Sea and the mouth of Lake Bardawil on the Mediterranean Sea.[95]

The Roman author Pliny the Elder, writing in the 1st century CE, stated that "The whole globe is divided into three parts, Europe, Asia, and Africa", adding:

I shall first then speak of Europe, the foster-mother of that people which has conquered all other nations, and itself by far the most beauteous portion of the earth. Indeed, many persons have, not without reason, considered it, not as a third part only of the earth, but as equal to all the rest, looking upon the whole of our globe as divided into two parts only, by a line drawn from the river Tanais to the Straits of Gades.[96]

Medieval T and O map showing the three continents as domains of the sons of Noah—Asia to Sem (Shem), Europe to Iafeth (Japheth), and Africa to Cham (Ham).

Following the fall of the Western Roman Empire, the culture that developed in its place, linked to Latin and the Catholic church, began to associate itself with the concept of Europe.[84] Through the Roman period and the Middle Ages, a few writers took the Isthmus of Suez as the boundary between Asia and Africa, but most writers continued to consider it the Nile or the western border of Egypt (Gibbon).[citation needed] In the Middle Ages, the world was usually portrayed on T and O maps, with the T representing the waters dividing the three continents. By the middle of the 18th century, "the fashion of dividing Asia and Africa at the Nile, or at the Great Catabathmus [the boundary between Egypt and Libya] farther west, had even then scarcely passed away".[97]

European arrival in the Americas

Christopher Columbus sailed across the Atlantic Ocean to the Caribbean in 1492, sparking a period of European exploration of the Americas. But despite four voyages to the Americas, Columbus never believed he had reached a new continent—he always thought it was part of Asia.

In 1501, Amerigo Vespucci and Gonçalo Coelho attempted to sail around what they considered the southern end of the Asian mainland into the Indian Ocean, passing through Fernando de Noronha. After reaching the coast of Brazil, they sailed along the coast of South America much farther south than Asia was known to extend, confirming that this was a land of continental proportions.[98] On return to Europe, an account of the voyage, called Mundus Novus ("New World"), was published under Vespucci's name in 1502 or 1503,[99] although it seems that it had additions or alterations by another writer.[100] Regardless of who penned the words, Mundus Novus credited Vespucci with saying, "I have discovered a continent in those southern regions that is inhabited by more numerous people and animals than our Europe, or Asia or Africa",[101] the first known explicit identification of part of the Americas as a continent like the other three.

Within a few years, the name "New World" began appearing as a name for South America on world maps, such as the Oliveriana (Pesaro) map of around 1504–1505. Maps of this time, though, still showed North America connected to Asia and showed South America as a separate land.[100]

Universalis Cosmographia, Waldseemüller's 1507 world map—the first to show the Americas separate from Asia

In 1507 Martin Waldseemüller published a world map, Universalis Cosmographia, which was the first to show North and South America as separate from Asia and surrounded by water. A small inset map above the main map explicitly showed for the first time the Americas being east of Asia and separated from Asia by an ocean, as opposed to just placing the Americas on the left end of the map and Asia on the right end. In the accompanying book Cosmographiae Introductio, Waldseemüller noted that the earth is divided into four parts, Europe, Asia, Africa, and the fourth part, which he named "America" after Amerigo Vespucci's first name.[102] On the map, the word "America" was placed on part of South America.

Beyond four continents

The Sanskrit text Rig Veda often dated 1500 BCE [note 1] has the earliest mention of seven continents in the Earth, the text claims that the Earth has seven continents and Lord Vishnu Measured the entire universe from his first foot from the land of Earth which has 7 continents.[109]

Rigveda page in Sanskrit

In regard to the above-quoted verses, it is commonly accepted that there are Seven Continents or 'regions of the earth'. A. Glucklich adds that 'In the Matsya Purana, for instance, there is a seven-part map of the world ... [it has] one centre, where an immense mountain – Mount Meru (or Maha Meru, Great Meru) – stands ... The continents encircle the mountain in seven concentric circles ... It seems clear that the Himalayas were the approximate location of Mt. Meru and the text is clear that the earth has seven continents.[109]

Hollandia Nova, 1659 map prepared by Joan Blaeu based on voyages by Abel Tasman and Willem Jansz, this image shows a French edition of 1663

From the late 18th century, some geographers started to regard North America and South America as two parts of the world, making five parts in total. Overall though, the fourfold division prevailed well into the 19th century.[112]

Europeans discovered Australia in 1606, but for some time it was taken as part of Asia. By the late 18th century, some geographers considered it a continent in its own right, making it the sixth (or fifth for those still taking America as a single continent).[112] In 1813, Samuel Butler wrote of Australia as "New Holland, an immense island, which some geographers dignify with the appellation of another continent" and the Oxford English Dictionary was just as equivocal some decades later.[113] It was in the 1950s that the concept of Oceania as a "great division" of the world was replaced by the concept of Australia as a continent.[114]

Antarctica was sighted in 1820 during the First Russian Antarctic Expedition and described as a continent by Charles Wilkes on the United States Exploring Expedition in 1838, the last continent identified, although a great "Antarctic" (antipodean) landmass had been anticipated for millennia. An 1849 atlas labelled Antarctica as a continent but few atlases did so until after World War II.[115]

Over time, the western concept of dividing the world into continents spread globally, replacing conceptions in other areas of the world. The idea of continents continued to become imbued with cultural and political meaning. In the 19th century during the Meiji period, Japanese leaders began to self-identify with the concept of being Asian, and renew relations with other "Asian" countries while conceiving of the idea of Asian solidarity against western countries. This conception of an Asian identity, as well as the idea of Asian solidarity, was later taken up by others in the region, such as Republican China and Vietnam.[116]

From the mid-19th century, atlases published in the United States more commonly treated North and South America as separate continents, while atlases published in Europe usually considered them one continent. However, it was still not uncommon for American atlases to treat them as one continent up until World War II.[117] From the 1950s, most U.S. geographers divided the Americas into two continents.[117] With the addition of Antarctica, this made the seven-continent model. However, this division of the Americas never appealed to Latin Americans, who saw their region spanning an América as a single landmass, and there the conception of six continents remains dominant, as it does in scattered other countries.[citation needed]

Some geographers regard Europe and Asia together as a single continent, dubbed Eurasia.[118] In this model, the world is divided into six continents, with North America and South America considered separate continents.

Geology

Further information: Continental crust and Plate tectonics

Geologists use the term continent in a different manner from geographers. In geology, a continent is defined by continental crust, which is a platform of metamorphic and igneous rock, largely of granitic composition. Continental crust is less dense and much thicker than oceanic crust, which causes it to "float" higher than oceanic crust on the dense underlying mantle. This explains why the continents form high platforms surrounded by deep ocean basins.[119][3]

Some geologists restrict the term continent to portions of the crust built around stable regions called cratons. Cratons have largely been unaffected by mountain-building events (orogenies) since the Precambrian. A craton typically consists of a continental shield surrounded by a continental platform. The shield is a region where ancient crystalline basement rock (typically 1.5 to 3.8 billion years old) is widely exposed at the surface. The platform surrounding the shield is also composed of ancient basement rock, but with a cover of younger sedimentary rock.[120] The continents are accretionary crustal "rafts" that, unlike the denser basaltic crust of the ocean basins, are not subjected to destruction through the plate tectonic process of subduction. This accounts for the great age of the rocks comprising the continental cratons.[121]

The margins of geologic continents are either active or passive. An active margin is characterised by mountain building, either through a continent-on continent collision or a subduction zone. Continents grow by accreting lighter volcanic island chains and microcontinents along these active margins, forming orogens. At a passive margin, the continental crust is stretched thin by extension to form a continental shelf, which tapers off with a gradual slope covered in sediment, connecting it directly to the oceanic crust beyond. Most passive margins eventually transition into active margins: where the oceanic plate becomes too heavy due to cooling, it disconnects from the continental crust, and starts subducting below it, forming a new subduction zone.[122]

Principal tectonic plates of the continents and the floor of the oceans

There are many microcontinents, or continental fragments, that are built of continental crust but do not contain a craton. Some of these are fragments of Gondwana or other ancient cratonic continents: Zealandia,[75] which includes New Zealand and New Caledonia; Madagascar; the northern Mascarene Plateau, which includes the Seychelles. Other islands, such as several in the Caribbean Sea, are composed largely of granitic rock as well, but all continents contain both granitic and basaltic crust, and there is no clear boundary as to which islands would be considered microcontinents under such a definition. The Kerguelen Plateau, for example, is largely volcanic, but is associated with the breakup of Gondwanaland and is considered a microcontinent,[123][124] whereas volcanic Iceland and Hawaii are not. The British Isles, Sri Lanka, Borneo, and Newfoundland were on the margins of the Laurasian continent—only separated from the main continental landmass by inland seas flooding its margins.

The movement of plates has caused the continual formation and breakup of continents, and occasionally supercontinents, in a process called the Wilson Cycle. The supercontinent Columbia or Nuna formed during a period of 2.0–1.8 billion years ago and broke up about 1.5–1.3 billion years ago.[125][126] The supercontinent Rodinia is thought to have formed about 1 billion years ago and to have embodied most or all of Earth's continents, and broken up into eight continents around 600 million years ago. The eight continents later reassembled into another supercontinent called Pangaea; Pangaea broke up into Laurasia (which became North America and Eurasia) and Gondwana (which became the remaining continents).[127]

Criticism

Some academics, such as the historical geographer Martin W. Lewis argue that the systems we understand today are more rooted in social, political, and cultural history than in geological fact, a view particularly outlined in his book The Myth of Continents: A Critique of Metageography.[128]

See also

Notes

  1. ^ It is certain that the hymns of the Rig Veda post-date Indo-Iranian separation of c. 2000 BCE and probably that of the relevant Mitanni documents of c. 1400 BCE. Philological estimates tend to date the bulk of the text to the second half of the second millennium:
    • Max Müller: "the hymns of the Rig-Veda are said to date from 1500 B.C."[103]
    • The EIEC (s.v. Indo-Iranian languages, p. 306) gives 1500–1000 BCE.
    • Flood and Witzel both mention c. 1500–1200 BCE.[104][105]
    • Anthony mentions c. 1500–1300 BCE.[106]
    • Thomas Oberlies (Die Religion des Rgveda, 1998, p. 158) based on 'cumulative evidence' sets a wide range of 1700–1100 BCE.[107] Oberlies 1998, p. 155 gives an estimate of 1100 BCE for the youngest hymns in book 10.[108]
    • Witzel 1995, p. 4 mentions c. 1500–1200 BCE. According to Witzel 1997, p. 263, the whole Rig Vedic period may have lasted from c. 1900 BCE to c. 1200 BCE: "the bulk of the RV represents only 5 or 6 generations of kings (and of the contemporary poets) of the Pūru and Bharata tribes. It contains little else before and after this "snapshot" view of contemporary Rgvedic history, as reported by these contemporary "tape recordings." On the other hand, the whole Rgvedic period may have lasted even up to 700 years, from the infiltration of the Indo-Aryans into the subcontinent, c. 1900 B.C. (at the utmost, the time of collapse of the Indus civilization), up to c. 1200 B.C., the time of the introduction of iron which is first mentioned in the clearly post-gvedic hymns of the Atharvaveda."
  1. ^ In accordance with these attributes, Eurasia and North America are connected by a bridge of continental crust at least 2 thousand kilometers wide. And with Africa, Eurasia is connected by such a bridge (interrupted by internal sections of the oceanic crust) with a width of at least 5 thousand kilometers.

References

  1. ^ "Continents: What is a Continent?". National Geographic. 20 September 2011. Archived from the original on 16 July 2019. Retrieved 6 December 2020. "Most people recognize seven continents—Asia, Africa, North America, South America, Antarctica, Europe, and Australia, from largest to smallest—although sometimes Asia and Europe are considered a single continent, Eurasia."
  2. ^ Murray, Warwick E. (2016). "Changing Rural Worlds – A Global View". In Daniels, Peter; Bradshaw, Michael; Shaw, Denis; Sidaway, James; Hall, Tim (eds.). An Introduction To Human Geography (5th ed.). Pearson. p. 231. ISBN 978-1-292-12939-6.
  3. ^ a b Neuendorf, K.K.E.; Mehl, J.P. Jr.; Jackson, J.A., eds. (2005). Glossary of Geology (5th ed.). Alexandria, Virginia: American Geological Institute. p. 139. ISBN 978-0922152896.
  4. ^ Choi, Charles Q. (16 July 2015). "Did Ancient Mars Have Continents?". Space.com. Archived from the original on 9 June 2023. Retrieved 6 December 2020.
  5. ^ a b c "continent n." (1989) Oxford English Dictionary, 2nd edition. Oxford University Press.
  6. ^ "continent1 n." (2006) The Concise Oxford English Dictionary, 11th edition revised. (Ed.) Catherine Soanes and Angus Stevenson. Oxford University Press.
  7. ^ Lewis & Wigen, The Myth of Continents (1997), p. 29.
  8. ^ Bowen, Emanuel. (1752). A Complete Atlas, or Distinct View of the Known World. London, p. 3.
  9. ^ Lewis & Wigen, The Myth of Continents (1997), p. 21.
  10. ^ "Ocean". answers.com. 2006. Archived from the original on 3 March 2007. Retrieved 20 February 2007.
  11. ^ "Distribution of land and water on the planet Archived 31 May 2008 at the Wayback Machine." UN Atlas of the Oceans Archived 15 September 2008 at the Wayback Machine (2004). Retrieved 20 February 2007.
  12. ^ "How Many Continents Are There? You May Not Like the Answers". 30 October 2024. Retrieved 3 November 2024.
  13. ^ "continent n. 5. a." (1989) Oxford English Dictionary, 2nd edition. Oxford University Press; "continent1 n." (2006) The Concise Oxford English Dictionary, 11th edition revised. (Ed.) Catherine Soanes and Angus Stevenson. Oxford University Press; "continent1 n." (2005) The New Oxford American Dictionary, 2nd edition. (Ed.) Erin McKean. Oxford University Press; "continent [2, n] 4 a" (1996) Webster's Third New International Dictionary, Unabridged. ProQuest Information and Learning; "continent" (2007) Encyclopædia Britannica. Retrieved 14 January 2007, from Encyclopædia Britannica Online.
  14. ^ "What constitutes the United States, what are the official definitions?". United States Geological Survey. Archived from the original on 16 November 2017. Retrieved 21 November 2022.
  15. ^ "continent [2, n] 6" (1996) Webster's Third New International Dictionary, Unabridged. ProQuest Information and Learning. "a large segment of the earth's outer shell including a terrestrial continent and the adjacent continental shelf"
  16. ^ Monkhouse, F. J.; Small, John (1978). A Dictionary of the Natural Environment. London: Edward Arnold. pp. 67–68. structurally it includes shallowly submerged adjacent areas (continental shelf) and neighboring islands
  17. ^ Ollier, Cliff D. (1996). Planet Earth. In Ian Douglas (Ed.), Companion Encyclopedia of Geography: The Environment and Humankind. London: Routledge, p. 30. "Ocean waters extend onto continental rocks at continental shelves, and the true edges of the continents are the steeper continental slopes. The actual shorelines are rather accidental, depending on the height of sea level on the sloping shelves."
  18. ^ "How Many Continents Are There? You May Not Like the Answers". 30 October 2024. Retrieved 3 November 2024.
  19. ^ Lewis & Wigen, The Myth of Continents (1997), p. 40: "The joining of Australia with various Pacific islands to form the quasi continent of Oceania ... "
  20. ^ Lewis & Wigen, The Myth of Continents (1997), p. 35.
  21. ^ Lewis & Wigen, The Myth of Continents (1997), Chapter 1: "While it might seem surprising to find North and South America still joined into a single continent in a book published in the United States in 1937, such a notion remained fairly common until World War II. [...] By the 1950s, however, virtually all American geographers had come to insist that the visually distinct landmasses of North and South America deserved separate designations."
  22. ^ Lewis & Wigen, The Myth of Continents (1997), pp. 104–123.
  23. ^ McColl, R.W., ed. (2005). "continents". Encyclopedia of World Geography. Vol. 1. Facts on File, Inc. p. 215. ISBN 978-0-8160-7229-3. Archived from the original on 21 February 2023. Retrieved 26 June 2012 – via Google Books. And since Africa and Asia are connected at the Suez Peninsula, Europe, Africa, and Asia are sometimes combined as Afro-Eurasia or Eurafrasia. The International Olympic Committee's official flag, containing [...] the single continent of America (North and South America being connected as the Isthmus of Panama).
  24. ^ Chopping, Richard; Blewett, Richard; Kennett, Brian (2018). The Australian Continent. Canberra: Australian National University Press. p. 4. doi:10.22459/ac.08.2018. ISBN 978-1-76046-247-5. S2CID 135195553. Archived from the original on 14 February 2022. Retrieved 8 December 2020.
  25. ^ Dempsey, Caitlin (15 October 2013). "Geography Facts about the World's Continents". Geography Realm. Archived from the original on 26 August 2022. Retrieved 26 August 2022.
  26. ^ "How many continents are there?". Wonderopolis. Archived from the original on 29 May 2023. Retrieved 26 April 2020. If you count Europe and Asia as one continent (called Eurasia), then there are six continents. Some people also count North America and South America as one continent (called America), since the two land masses are separated only by the human-made Panama Canal. This would allow for a model with only five continents.wonderopolis
  27. ^ Strobel, Christoph (2015). The Global Atlantic: 1400 to 1900. Routledge. pp. 13–. ISBN 978-1-317-52552-3.
  28. ^ Manual of Modern Geography: 2. William Blackwood. 1870. pp. 18– – via Google Books.
  29. ^ Dunn, Ross E.; Mitchell, Laura J.; Ward, Kerry (2016). The New World History: A Field Guide for Teachers and Researchers. University of California Press. pp. 232–. ISBN 978-0-520-28989-5. Archived from the original on 21 February 2023. Retrieved 26 April 2020 – via Google Books.
  30. ^ Chatterjee, Sankar (2015). The Rise of Birds: 225 Million Years of Evolution. Johns Hopkins University Press. pp. 204–. ISBN 978-1-4214-1614-4 – via Google Books.
  31. ^ Mackay, Alexander (1861). Manual of Modern Geography: Mathematical, Physical, and Political : on a New Plan : Embracing a Complete Development of the River Systems of the Globe. W. Blackwood and Sons. pp. 15–.
  32. ^ Kermack, D. M. (2013). The Evolution of Mammalian Characters. Springer Science+Business Media. pp. 141–. ISBN 978-1-4684-7817-4 – via Google Books.
  33. ^ [1] Archived 26 March 2023 at the Wayback Machine "In some textbooks, North and South America are combined into 'America' and/or Europe and Asia are combined into 'Eurasia', for a grand total of 6 or even 5."scienceline
  34. ^ Martin W. Lewis and Kären E. Wigen, The Myth of Continents: A Critique of Metageography (Berkeley and Los Angeles: University of California Press, 1997)Wigen
  35. ^ [2] Archived 16 May 2023 at the Wayback Machine "There are even geographical views that prefer the presence of both a Eurasian as well as one American continent. These geographers therefore contend that there should only be 5 continents."universetoday
  36. ^ a b "Continent Archived 19 June 2019 at the Wayback Machine". Encyclopædia Britannica. 2006. Chicago: Encyclopædia Britannica, Inc.
  37. ^ "Continent". The Columbia Encyclopedia. New York: Columbia University Press. 2001. Archived from the original on 2 February 2007 – via Bartleby.
  38. ^ a b [3] Older/previous official Greek Paedagogical Institute 6th grade Geography textbook (at the Wayback Machine), 5+1 continents combined-America model; Pankosmios Enyklopaidikos Atlas, CIL Hellas Publications, ISBN 84-407-0470-4, p. 30, 5+1 combined-America continents model; Neos Eikonographemenos Geographikos Atlas, Siola-Alexiou, 6 continents combined-America model; Lexico tes Hellenikes Glossas, Papyros Publications, ISBN 978-960-6715-47-1, lemma continent (epeiros), 5 continents model; Lexico Triantaphyllide online dictionary, Greek Language Center (Kentro Hellenikes Glossas), lemma continent (epeiros Archived 3 April 2019 at the Wayback Machine), 6 continents combined-America model; Lexico tes Neas Hellenikes Glossas, G.Babiniotes, Kentro Lexikologias (Legicology Center) LTD Publications, ISBN 960-86190-1-7, lemma continent (epeiros), 6 continents combined-America model
  39. ^ World Archived 24 November 2023 at the Wayback Machine, National Geographic – Xpeditions Atlas. 2006. Washington, DC: National Geographic Society.
  40. ^ The World – Continents Archived 21 February 2006 at the Wayback Machine, Atlas of Canada Archived 21 February 2006 at the Wayback Machine
  41. ^ The New Oxford Dictionary of English. 2001. New York: Oxford University Press.
  42. ^ "Continent Archived 28 October 2009 at the Wayback Machine". MSN Encarta Online Encyclopedia 2006.. 31 October 2009.
  43. ^ "Continent". McArthur, Tom, ed. 1992. The Oxford Companion to the English Language. New York: Oxford University Press; p. 260.
  44. ^ "F-10 Curriculum Geograph". Australian Curriculum, Assessment, and Reporting Authority. Archived from the original on 24 March 2014.
  45. ^ "National curriculum in England: geography programmes of study". UK Department for Education. Archived from the original on 30 March 2023. Retrieved 24 March 2014.
  46. ^ "Какое количество материков и частей света на планете Земля?". Природа Мира. 10 January 2018. Archived from the original on 7 November 2023. Retrieved 7 November 2023.
  47. ^ "kontynent". encyklopedia pwn. WN PWN SA. Archived from the original on 7 November 2023. 7 November 2023
  48. ^ "Preamble" (PDF). Olympic Charter. International Olympic Committee. 17 July 2020. p. 10. Archived (PDF) from the original on 19 November 2021. Retrieved 3 August 2021. the five interlaced rings, which represent the union of the five continents
  49. ^ "The Four Sub-regions Of Oceania". WorldAtlas. 26 December 2017. Archived from the original on 24 January 2022. Retrieved 24 January 2022.
  50. ^ Gorvett, Zaria (29 September 2023). "New maps of Earth's lost continent". BBC Home. Retrieved 7 July 2024.
  51. ^ "Asia". Encyclopædia Britannica. 2023. Archived from the original on 18 November 2008. Retrieved 1 December 2023.
  52. ^ "Africa". Encyclopædia Britannica. 2023. Archived from the original on 25 January 2021. Retrieved 1 December 2023.
  53. ^ "North America". Encyclopædia Britannica. 2023. Archived from the original on 3 May 2015. Retrieved 1 December 2023.
  54. ^ "South America". Encyclopædia Britannica. 2023. Archived from the original on 7 May 2020. Retrieved 1 December 2023.
  55. ^ "Antarctica". Encyclopædia Britannica. 2023. Archived from the original on 19 June 2015. Retrieved 1 December 2023.
  56. ^ "Europe". Encyclopædia Britannica. 2023. Archived from the original on 12 December 2014. Retrieved 1 December 2023.
  57. ^ "Australia". Encyclopædia Britannica. 2023. Archived from the original on 2 May 2015. Retrieved 1 December 2023.
  58. ^ "Oceania". Encyclopædia Britannica. 2023. Archived from the original on 13 September 2023. Retrieved 1 December 2023.
  59. ^ "World Population Prospects 2022". United Nations Department of Economic and Social Affairs, Population Division. Retrieved 17 July 2022.
  60. ^ "World Population Prospects 2022: Demographic indicators by region, subregion and country, annually for 1950-2100" (XSLX) ("Total Population, as of 1 July (thousands)"). United Nations Department of Economic and Social Affairs, Population Division. Retrieved 17 July 2022.
  61. ^ Evans, D.A.D. (2013). "Reconstructing pre-Pangean supercontinents" (PDF). GSA Bulletin. 125 (11–12): 1736. Bibcode:2013GSAB..125.1735E. doi:10.1130/B30950.1. ISSN 0016-7606. Archived (PDF) from the original on 26 March 2023. Retrieved 8 December 2023.
  62. ^ a b c d Baldwin, James A. (2014), "Continents", in R.W. McColl (ed.), Encyclopedia of World Geography, Infobase Publishing, pp. 214–216, ISBN 978-0-8160-7229-3 – via Google Books
  63. ^ Scholvin, Sören (2016). The Geopolitics of Regional Power. Routledge. p. 16. ISBN 9781317030461.
  64. ^ Molnar, Peter (2015). Plate Tectonics: A Very Short Introduction. Oxford: Oxford University Press. ISBN 978-0-19-104396-3 – via Google Books.
    • p. 98: Thus, we can calculate past positions of the Indian Plate, with the Indian Subcontinent as its passenger, with respect to the Eurasian Plate.
    • p. 116: The Arabian Subcontinent later, approximately 35 million years ago, collided with southern Eurasia to form the Zagros Mountains of southwestern Iran.
  65. ^ Nares Strait and the drift of Greenland: a conflict in plate tectonics. Museum Tusculanum Press. 1982. pp. 32–. ISBN 978-87-635-1150-6 – via Google Books.
  66. ^ Farmer, G. Thomas; Cook, John (2013), Climate Change Science: A Modern Synthesis: Volume 1 – The Physical Climate, Springer Science+Business Media, pp. 281–, ISBN 978-94-007-5757-8 – via Google Books
  67. ^ Gallay, Alan (2015). Colonial Wars of North America, 1512–1763 (Routledge Revivals): An Encyclopedia. Routledge. pp. 204–. ISBN 978-1-317-48719-7 – via Google Books.
  68. ^ Innes, John L.; Haron, Abu Hassan (2000). Air Pollution and the Forests of Developing and Rapidly Industrializing Regions. CABI. pp. 36–. ISBN 978-0-85199-932-6 – via Google Books.
  69. ^ Vivares, Ernesto (2014). Exploring the New South American Regionalism (NSAR). Ashgate Publishing, Ltd. pp. 40–. ISBN 978-1-4094-6961-2 – via Google Books.
  70. ^ Leonard, Thomas M. (2005). Encyclopedia of the Developing World. Psychology Press. pp. 1637–. ISBN 978-1-57958-388-0 – via Google Books.
  71. ^ In Ibero-America, North America usually designates a region (subcontinente in Spanish) of the Americas containing Canada, the United States, and Mexico, and often Greenland, Saint Pierre and Miquelon, and Bermuda; the land bridge of Central America is generally considered a subregion of North America.Norteamérica (Mexican version) Archived 30 January 2009 at the Wayback Machine/(Spaniard version) Archived 29 January 2009 at the Wayback Machine. Encarta Online Encyclopedia. 2009.
  72. ^ Rafferty, John P. "A Tale of Two Submerged Continents". Encyclopedia Britannica. Archived from the original on 7 June 2023. Retrieved 26 December 2020.
  73. ^ Cassimaly, Khalil a (5 March 2013). "The Violent History Of Mauritia: Birth, Oblivion, Renaissance | Labcoat Life | Learn Science at Scitable". Nature. Archived from the original on 7 June 2023. Retrieved 31 December 2020.
  74. ^ Hillstrom, Kevin; Collier Hillstrom, Laurie (2003). Africa and the Middle East: a continental overview of environmental issues. Santa Barbara, CA: ABC-CLIO. p. 50. ISBN 978-1-57607-688-0 – via Google Books.
  75. ^ a b Mortimer, N.; Campbell, H.J.; Tulloch, A.J.; King, P.R.; Stagpoole, V.M.; Wood, R.A.; Rattenbury, M.S.; Sutherland, R.; Adams, C.J.; Collot, J.; Seton, M. (2017). "Zealandia: Earth's Hidden Continent". GSA Today. 27 (3): 27–35. doi:10.1130/GSATG321A.1. Archived from the original on 17 February 2017. Retrieved 20 February 2020.
  76. ^ Hunt, Elle (17 February 2017). "Zealandia – pieces finally falling together for continent we didn't know we had". The Guardian. Archived from the original on 25 October 2019. Retrieved 8 December 2023.
  77. ^ "Chunk of an ancient supercontinent discovered under New Zealand". Science. 21 July 2021. Archived from the original on 21 July 2021.
  78. ^ Woodward, Aylin. "A fragment of a mysterious 8th continent is hiding under New Zealand — and it's twice as old as scientists thought". Business Insider. Archived from the original on 2 October 2023. Retrieved 8 December 2023.
  79. ^ Barsted, George (17 August 2021). "Ancient Continent Of Zealandia Raises New Questions For Geologists". Archived from the original on 10 May 2023. Retrieved 8 December 2023.
  80. ^ "Earth's Hidden Continent Zealandia Finally Recognized". 4 October 2017. Archived from the original on 2 June 2023. Retrieved 8 December 2023.
  81. ^ Henry George Liddell, Robert Scott, Henry Stuart Jones, A Greek-English Lexicon (1940), s.v. ἤπειρος. The English noun was introduced in the mid-16th century, shortened from continent land (15th century), adapted from Latin terra continens "continuous landmass".
  82. ^ a b Toynbee, Arnold J. (1954). A Study of History. London: Oxford University Press, v. 8, pp. 711–712.
  83. ^ Tozer, H. F. (1897). A History of Ancient Geography. Cambridge: University Press. p. 69.
  84. ^ a b Pocock, J. G. A. (2002). "Some Europes in Their History". In Pagden, Anthony (ed.). The Idea of Europe From Antiquity to the European Union. Cambridge University Press. pp. 57–61. doi:10.1017/CBO9780511496813.003. ISBN 978-0511496813. Archived from the original on 23 March 2022. Retrieved 8 December 2023.
  85. ^ Tozer, H. F. (1897). A History of Ancient Geography. Cambridge: Cambridge University Press. p. 67.
  86. ^ Lewis & Wigen, The Myth of Continents (1997), pp. 21–22.
  87. ^ Tozer, H. F. (1897). A History of Ancient Geography. Cambridge: Cambridge University Press. p. 68.
  88. ^ Herodotus. Translated by George Rawlinson (2000). The Histories of Herodotus of Halicarnassus. [4] Ames, Iowa: Omphaloskepsis, book 2, p. 18. Archived 19 August 2006 at the Wayback Machine
  89. ^ "Herodotus, Histories, Book IV, Chapters 40-41". penelope.uchicago.edu. As far as India, Asia is an inhabited land; but thereafter all to the east is desert, nor can any man say what kind of land is there. Such is Asia, and such its extent. But Libya is on this second promontory; for Libya comes next after Egypt.
  90. ^ "Herodotus, Histories, Book II, Chapter 8". topostext.org.
  91. ^ "Herodotus, Histories, Book II, Chapter 17". penelope.uchicago.edu.
  92. ^ "Herodotus, Histories, Book IV, Chapter 197". penelope.uchicago.edu.
  93. ^ Herodotus. Translated by George Rawlinson (2000). The Histories of Herodotus of Halicarnassus "Archived copy" (PDF). Archived from the original (PDF) on 19 August 2006. Retrieved 8 February 2016.{{cite web}}: CS1 maint: archived copy as title (link). Ames, Iowa: Omphaloskepsis, book 4, p. 38. "I cannot conceive why three names ... should ever have been given to a tract which is in reality one,"
  94. ^ "Herodotus, the Histories, Book 4, chapter 42, section 1".
  95. ^ Strabo. Translated by Horace Leonard Jones (1917). Geography.[5] Harvard University Press, book 1, ch. 4.[6]
  96. ^ "Pliny the Elder, The Natural History (Plin. Nat. 3.1)". perseus.tufts.edu.
  97. ^ Goddard, Farley Brewer (1884). "Researches in the Cyrenaica". The American Journal of Philology, 5 (1) p. 38.
  98. ^ O'Gorman, Edmundo (1961). The Invention of America. Indiana University Press. pp. 106–112.
  99. ^ Formisano, Luciano (Ed.) (1992). Letters from a New World: Amerigo Vespucci's Discovery of America. New York: Marsilio, pp. xx–xxi. ISBN 0-941419-62-2.
  100. ^ a b Zerubavel, Eviatar (2003). Terra Cognita: The Mental Discovery of America. New Brunswick: Transaction Publishers, pp. 77–79. ISBN 0-7658-0987-7.
  101. ^ Formisano, Luciano (Ed.) (1992). Letters from a New World: Amerigo Vespucci's Discovery of America. New York: Marsilio, p. 45. ISBN 0-941419-62-2.
  102. ^ Zerubavel, Eviatar (2003). Terra Cognita: The Mental Discovery of America. New Brunswick: Transaction Publishers, pp. 80–82. ISBN 0-7658-0987-7.
  103. ^ Müller, F. Max (1883). India: What Can It Teach Us?. London: Longmans, Green & Co. p. 202. Archived from the original on 7 July 2023. Retrieved 7 September 2023.
  104. ^ Flood 1996, p. 37.
  105. ^ Witzel 1995, p. 4.
  106. ^ Anthony 2007, p. 454.
  107. ^ Oberlies 1998, p. 158.
  108. ^ Oberlies 1998, p. 155.
  109. ^ a b Glucklich, Ariel (9 May 2008). The Strides of Vishnu: Hindu Culture in Historical Perspective. Oxford University Press. pp. 4, 153. ISBN 978-0-19-971825-2.
  110. ^ "RigVeda Book I XXI 'Aśvins and Others' (Sanskrit and Transliteration)". www.sacred-texts.com. Retrieved 19 January 2020.
  111. ^ "RigVeda Book I XXI 'Aśvins and Others'". www.sacred-texts.com. Retrieved 19 January 2020.
  112. ^ a b Lewis & Wigen, The Myth of Continents (1997), p. 30
  113. ^ "continent n. 5. a." (1989) Oxford English Dictionary, 2nd edition. Oxford University Press. "the great island of Australia is sometimes reckoned as another [continent]"
  114. ^ Lewis & Wigen, The Myth of Continents (1997), p. 32: "...the 1950s... was also the period when... Oceania as a "great division" was replaced by Australia as a continent along with a series of isolated and continentally attached islands. [Footnote 78: When Southeast Asia was conceptualized as a world region during World War II..., Indonesia and the Philippines were perforce added to Asia, which reduced the extent of Oceania, leading to a reconceptualization of Australia as a continent in its own right. This maneuver is apparent in postwar atlases]"
  115. ^ Lewis, Martin W.; Wigen, Kären E. (1997). The Myth of Continents: a Critique of Metageography. Berkeley: University of California Press. ISBN 978-0-520-20743-1.
  116. ^ Mitani, Hiroshi (Fall 2006). "The Concept of Asia: From Geography to Ideology". New Perspectives on Turkey. 35: 21–34. doi:10.1017/S0896634600004465. S2CID 130570425. Archived from the original on 21 November 2021. Retrieved 21 November 2021.
  117. ^ a b Lewis, Martin W.; Wigen, Kären E. (1997). The Myth of Continents: a Critique of Metageography. Berkeley: University of California Press. p. 32. ISBN 978-0-520-20742-4.
  118. ^ "Frequently Asked Questions - General Geography Information - How many continents are there?". National Geographic Society. Archived from the original on 6 March 2008. Retrieved 26 September 2010. Some geographers list only six continents, combining Europe and Asia into Eurasia. In parts of the world, students learn that there are just five continents: Eurasia, Australia, Africa, Antarctica, and the Americas.
  119. ^ Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. pp. 173–174. ISBN 978-0470387740.
  120. ^ Levin 2010, p. 83.
  121. ^ Levin 2010, p. 194.
  122. ^ Grotzinger, John P.; Jordan, Thomas H. (2014). "10". Understanding Earth (7t ed.). New York: W.H. Freeman. ISBN 978-1-4641-3874-4. OCLC 884299180.
  123. ^ "UT Austin scientist plays major rule in study of underwater "micro-continent"". Office of Public Affairs. The University of Texas at Austin. 28 May 1999. Archived from the original on 3 November 2007. Retrieved 26 August 2012.
  124. ^ Whitehouse, David (27 May 1999). "Sci/Tech | 'Lost continent' discovered". BBC News. Archived from the original on 10 March 2012. Retrieved 26 August 2012.
  125. ^ Zhao, Guochun; Cawood, Peter A.; Wilde, Simon A.; Sun, M. (November 2002). "Review of global 2.1–1.8 Ga orogens: implications for a pre-Rodinia supercontinent". Earth-Science Reviews. 59 (1): 125–162. Bibcode:2002ESRv...59..125Z. doi:10.1016/S0012-8252(02)00073-9.
  126. ^ Zhao, Guochun; Sun, M.; Wilde, Simon A.; Li, S.Z. (November 2004). "A Paleo-Mesoproterozoic supercontinent: assembly, growth and breakup". Earth-Science Reviews. 67 (1): 91–123. Bibcode:2004ESRv...67...91Z. doi:10.1016/j.earscirev.2004.02.003. Archived from the original on 9 April 2019. Retrieved 24 July 2019.
  127. ^ Grotzinger, John P.; Jordan, Thomas H. (2014). Understanding Earth (7 ed.). New York: W.H. Freeman. ISBN 978-1-4641-3874-4. OCLC 884299180. Archived from the original on 8 December 2023. Retrieved 5 January 2022.
  128. ^ Lewis, Martin W.; Wigen, Kären (11 August 1997). The Myth of Continents. Berkeley: Univ of California Press. ISBN 978-0-520-20743-1.

Bibliography

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