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1、Geography of the United KingdomFrom Wikipedia, the free encyclopediaJump to: navigation, searchThe United Kingdom occupies a substantial part of the British Isles.The United Kingdom of Great Britain and Northern Ireland, or UK, is a sovereign state located off the northwestern coast of continental E
2、urope. With a total area of approximately 243,610 square kilometres (94,060 sq mi), the UK occupies the major part of the British Isles1 archipelago and includes the island of Great Britain, the north-eastern one-sixth of the island of Ireland and many smaller surrounding islands. The mainland areas
3、 lie between latitudes 49N and 59N (the Shetland Islands reach to nearly 61N), and longitudes 8W to 2E. The Royal Greenwich Observatory, in South East London, is the defining point of the Prime Meridian.The UK lies between the North Atlantic and the North Sea, and comes within 35 km (22 mi) of the n
4、orthwest coast of France, from which it is separated by the English Channel. It shares a 360 km international land boundary with the Republic of Ireland. The Channel Tunnel bored beneath the English Channel, now links the UK with France.The British Overseas Territories and Crown Dependencies are cov
5、ered in their own respective articles, see below.Content是 1 Area 2 Physical geographyo 2.1 Geologyo 2.2 Mountains and hillso 2.3 Rivers and lakeso 2.4 Artificial waterwayso 2.5 Coastline 2.5.1 Inlets 2.5.2 Headlandso 2.6 Islandso 2.7 Climate 3 Human geographyo 3.1 Demographicso 3.2 Political geograp
6、hy 3.2.1 National government 3.2.2 Local governmento 3.3 Economic geography 3.3.1 Primary industry 3.3.2 Manufacturing 3.3.3 Finance and services 3.3.4 Regional disparity 4 Natural resources 5 Environmento 5.1 Current issueso 5.2 International agreements 6 Antipodes 7 Geography of dependencieso 7.1
7、Crown dependencieso 7.2 Overseas territories 8 See also 9 References 10 External linksAreaThe total area of the United Kingdom is approximately 245,000 square kilometres (94,600 sq mi), comprising the island of Great Britain, the northeastern one-sixth of the island of Ireland (Northern Ireland) and
8、 many smaller islands. England is the largest country of the United Kingdom, at 130,410 square kilometres (50,350 sq mi) accounting for just over half the total area of the UK. Scotland at 78,772 square kilometres (30,410 sq mi),2 is second largest, accounting for about a third of the area of the UK
9、. Wales and Northern Ireland are much smaller, covering 20,758 square kilometres (8,010 sq mi) and 14,160 square kilometres (5,470 sq mi) respectively.The area of the countries of the United Kingdom is set out in the table below. Information about the area of England, the largest country, is also br
10、oken down by region.RankNameArea1England130,427 km South West 3 East of England South East 4 East Midlands Yorkshire and the Humber North West 5 West Midlands 6 North East 7 London 823,837 km19,120 km19,096 km15,627 km15,420 km14,165 km12,998 km8,592 km1,572 km2Scotland 978,772 km3Wales 1020,778 km4
11、Northern Ireland13,843 kmUnited Kingdom243,820 kmOverseas territories1,727,570 kmThe British Antarctic Territory, which covers an area of 1,709,400 km2 is geographically the largest of the British Overseas Territories followed by the Falkland Islands which covers an area of 12,173 km2. The remaining
12、 twelve overseas territories cover an area 5,997 km2.Physical geographyUKs topographyThe physical geography of the UK varies greatly. England consists of mostly lowland terrain, with upland or mountainous terrain only found north-west of the Tees-Exe line. The upland areas include the Lake District,
13、 the Pennines, Exmoor and Dartmoor. The lowland areas are typically traversed by ranges of low hills, frequently composed of chalk. The physical geography of Scotland is distinguished by the Highland Boundary Fault which traverses the Scottish mainland from Helensburgh to Stonehaven. The faultline s
14、eparates the two distinctively different regions of the Highlands to the north and west, and the lowlands to the south and east. Wales is mostly mountainous, though south Wales is less mountainous than north and mid Wales. The geography of Ireland includes the Mourne Mountains as well as Lough Neagh
15、, at 388 square kilometres (150 sq mi), the largest body of water in the UK and Ireland.11The overall geomorphology of the UK was shaped by the combined forces of tectonics and climate change, in particular glaciation.The exact centre of the island of Great Britain is disputed. Depending upon how it
16、 is calculated it can be either Haltwhistle in Northumberland, or Dunsop Bridge in Lancashire.GeologySee also: Geology of Great Britain and Geology of IrelandThe geology of the UK is complex and diverse, a result of it being subject to a variety of plate tectonic processes over a very extended perio
17、d of time. Changing latitude and sea levels have been important factors in the nature of sedimentary sequences, whilst successive continental collisions have affected its geological structure with major faulting and folding being a legacy of each orogeny (mountain-building period), often associated
18、with volcanic activity and the metamorphism of existing rock sequences. As a result of this eventful geological history, the UK shows a rich variety of landscapes.12The oldest rocks in the British Isles are the Lewisian gneisses, metamorphic rocks found in the far north west of Scotland and in the H
19、ebrides (with a few small outcrops elsewhere), which date from at least 2,700 Ma (Ma = million years ago). South of the gneisses are a complex mixture of rocks forming the North West Highlands and Grampian Highlands in Scotland. These are essentially the remains of folded sedimentary rocks that were
20、 deposited between 1,000 Ma and 670 Ma over the gneiss on what was then the floor of the Iapetus Ocean.At 520 Ma, what is now Great Britain was split between two continents; the north of Scotland was located on the continent of Laurentia at about 20 south of the equator, while the rest of the countr
21、y was on the continent of Gondwana near the Antarctic Circle. In Gondwana, England and Wales were largely submerged under a shallow sea studded with volcanic islands. The remains of these islands underlie much of central England with small outcrops visible in many places.About 500 Ma southern Britai
22、n, the east coast of North America and south-east Newfoundland broke away from Gondwana to form the continent of Avalonia, which by 440 Ma had drifted to about 30 south. During this period north Wales was subject to volcanic activity. The remains of these volcanoes are still visible, one example of
23、which is Rhobell Fawr dating from 510 Ma. Large quantities of volcanic lava and ash known as the Borrowdale Volcanics covered the Lake District and this can still be seen in the form of mountains such as Helvellyn and Scafell Pike.Between 425 and 400 Ma Avalonia had joined with the continent of Balt
24、ica, and the combined landmass collided with Laurentia at about 20 south, joining the southern and northern halves of Great Britain together. The resulting Caledonian Orogeny produced an Alpine-style mountain range in much of north and west Britain.The collision between continents continued during t
25、he Devonian period, producing uplift and subsequent erosion, resulting in the deposition of numerous sedimentary rock layers in lowlands and seas. The Old Red Sandstone found in Devon originated from these processes.Around 360 Ma Great Britain was lying at the equator, covered by the warm shallow wa
26、ters of the Rheic Ocean, during which time the Carboniferous Limestone was deposited, as found in the Mendip Hills and the Peak District of Derbyshire. Later, river deltas formed and the sediments deposited were colonised by swamps and rain forest. It was in this environment that the Coal Measures w
27、ere formed, the source of the majority of Britains extensive coal reserves.Around 280 Ma the Variscan orogeny mountain-building period occurred, again due to collision of continental plates, causing major deformation in south west England. The general region of Variscan folding was south of an eastw
28、est line roughly from south Pembrokeshire to Kent. Towards the end of this period granite was formed beneath the overlying rocks of Devon and Cornwall, now exposed at Dartmoor and Bodmin Moor.By the end of the Carboniferous period the various continents of the Earth had fused to form the super-conti
29、nent of Pangaea. Britain was located in the interior of Pangea where it was subject to a hot arid desert climate with frequent flash floods leaving deposits that formed beds of red sedimentary rock.As Pangaea drifted during the Triassic, Great Britain moved away from the equator until it was between
30、 20 and 30 north. The remnants of the Variscan uplands in France to the south were eroded down, resulting in layers of the New Red Sandstone being deposited across central England.Pangaea began to break up at the start of the Jurassic period. Sea levels rose and Britain and Ireland drifted on the Eu
31、rasian Plate to between 30 and 40 north. Much of the British Isles were under water again, and sedimentary rocks were deposited and can now be found underlying much of England from the Cleveland Hills of Yorkshire to the Jurassic Coast in Dorset. These include sandstones, greensands, oolitic limesto
32、ne of the Cotswold Hills, corallian limestone of the Vale of White Horse and the Isle of Portland. The burial of algae and bacteria below the mud of the sea floor during this time resulted in the formation of North Sea oil and natural gasThe modern continents having formed, the Cretaceous saw the fo
33、rmation of the Atlantic Ocean, gradually separating northern Scotland from North America. The land underwent a series of uplifts to form a fertile plain. After 20 million years or so, the seas started to flood the land again until much of Britain and Ireland were again below the sea, though sea leve
34、ls frequently changed. Chalk and flints were deposited over much of Great Britain, now notably exposed at the White Cliffs of Dover and the Seven Sisters, and also forming Salisbury Plain.Between 63 and 52 Ma, the last volcanic rocks in Great Britain were formed. The major eruptions at this time pro
35、duced the Antrim Plateau, the basaltic columns of the Giants Causeway and Lundy Island in the Bristol Channel.The Alpine Orogeny that took place in Europe about 50 Ma, was responsible for the folding of strata in southern England, producing the London Basin syncline, the Weald-Artois Anticline to th
36、e south, the North Downs, South Downs and Chiltern Hills.During the period the North Sea formed, Britain was uplifted. Some of this uplift was along old lines of weakness left from the Caledonian and Variscan Orogenies long before. The uplifted areas were then eroded, and further sediments, such as
37、the London Clay, were deposited over southern England.The major changes during the last 2 million years were brought about by several recent ice ages. The most severe was the Anglian Glaciation, with ice up to 1,000 m (3300 ft) thick that reached as far south as London and Bristol. This took place b
38、etween about 478,000 to 424,000 years ago, and was responsible for the diversion of the River Thames onto its present course. During the most recent Devensian glaciation, which ended a mere 10,000 years ago, the icesheet reached south to Wolverhampton and Cardiff. Among the features left behind by t
39、he ice are the fjords of the west coast of Scotland, the U-shaped valleys of the Lake District and erratics (blocks of rock) that have been transported from the Oslo region of Norway and deposited on the coast of Yorkshire.Amongst the most significant geological features created during the last twel
40、ve thousand years are the peat deposits of Ireland and Scotland, and of coastal and upland areas of England and Wales.At the present time Scotland is continuing to rise as a result of the weight of Devensian ice being lifted. Southern and eastern England is sinking, generally estimated at 1 mm (1/25
41、 inch) per year, with the London area sinking at double the speed partly due to the continuing compaction of the recent clay deposits.Mountains and hillsAt 1,344 metres, Ben Nevis is the highest peak in the UK.Main article: List of mountains and hills of the United KingdomThe ten tallest mountains i
42、n the UK are all found in Scotland. The highest peaks in each part of the UK are: Scotland: Ben Nevis, 1,344 metres Wales: Snowdon (Snowdonia), 1,085 metres England: Scafell Pike (Cumbrian Mountains), 978 metres Northern Ireland: Slieve Donard (Mourne Mountains), 852 metresThe ranges of mountains an
43、d hills in the UK include: Scotland: Cairngorms, Scottish Highlands, Southern Uplands, Grampian Mountains Wales: Brecon Beacons, Cambrian Mountains, Snowdonia, Black Mountains, Preseli Hills England: Cheviot Hills, Chilterns, Cotswolds, Dartmoor, Lincolnshire Wolds, Exmoor, Lake District, Malvern Hi
44、lls, Mendip Hills, North Downs, Peak District, Pennines, South Downs, Shropshire Hills, Yorkshire Wolds Northern Ireland: Mourne Mountains, Antrim Plateau, Sperrin MountainsThe lowest point of the UK is in the Fens of East Anglia, in England, parts of which lie up to 4 metres below sea level.Rivers
45、and lakesMain articles List of lakes and lochs in the United Kingdom; List of rivers of the United Kingdom; List of waterfalls of the United Kingdom.The longest river in the UK is the River Severn (220 mi, 354 km) which flows through both Wales and England.The longest rivers in the UK contained whol
46、ly within each of its constituent nations are: England: River Thames (215 mi, 346 km) Scotland: River Tay (117 mi, 188 km) N. Ireland: River Bann (76 mi, 122 km) Wales: River Tywi (64 mi, 103 km)The largest lakes (by surface area) in the UK by country are: N. Ireland: Lough Neagh (147.39 sq mi, 381.
47、74 km) Scotland: Loch Lomond (27.46 sq mi, 71.12 km) England: Windermere (5.69 sq mi, 14.74 km) Wales: Llyn Tegid (Bala Lake) (1.87 sq mi, 4.84 km)The deepest lake in the UK is Loch Morar with a maximum depth of 309 metres (Loch Ness is second at 228 metres deep). The deepest lake in England is Wast
48、water which achieves a depth of 79 metres (258 feet).Artificial waterwaysMain articles: Waterways in the United Kingdom, Canals of Great Britain, Reservoirs and dams in the United KingdomAs a result of its industrial history, the United Kingdom has an extensive system of canals, mostly built in the early years of the Industrial Revolution, before the rise of competition from the railways. The United Kingdom also has numerous dams and reservoirs to store water for drinking and industry. The generation of hydroelectric power
