Incubator escapee wiki

Chiltern Hills

Article Discussion
(Redirected from Chilterns)

Template:Use dmy dates Template:Short description Template:Infobox mountain The Chiltern Hills or the Chilterns are a chalk escarpment in southern England,<ref name=EB1911>Template:Cite EB1911</ref> located to the north-west of London, covering Template:Convert across Oxfordshire, Buckinghamshire, Hertfordshire and Bedfordshire; they stretch Template:Convert from Goring-on-Thames in the south-west to Hitchin in the north-east. The hills are Template:Convert at their widest.

In 1964, 833 square kilometers - almost half of the Chiltern Hills - were designated by the Countryside Commission<ref> Template:Cite book </ref> as an Area of Outstanding Natural Beauty (AONB) under the powers established by the National Parks and Access to the Countryside Act 1949.<ref> Template:Cite book </ref>

The north-west boundary of the Chilterns is clearly defined by the escarpment. The dip slope is by definition more gradual and merges with the landscape to the south-east.<ref name="HeppleDoggett"/> The south-west endpoint is the River Thames. The hills decline slowly in prominence in north-east Bedfordshire.<ref name=changelandscape>The Changing Landscape of the Chilterns Template:Webarchive Chilterns AoNB, Accessed 19 February 2012</ref><ref>Chiltern Society, The Chilterns Template:Webarchive.</ref>

GeologyEdit

File:Shirburn chalk field.jpg
Chalk visible in ploughed soil at the foot of the Chiltern Hill escarpment near Shirburn on the Buckinghamshire/Oxfordshire border

The chalk escarpment of the Chiltern Hills overlooks the Vale of Aylesbury and roughly coincides with the southernmost extent of the ice sheet during the Anglian glacial maximum.Template:Citation needed The Chilterns are part of a system of chalk downlands throughout eastern and southern England, comprising rocks of the Chalk Group, formed between 65 and 95 million years ago;<ref name=changelandscape/> this also includes Salisbury Plain, Cranborne Chase, the Isle of Wight and the South Downs in the south. In the north, the chalk formations continue northeastwards across Hertfordshire, Norfolk and the Lincolnshire Wolds, finally ending as the Yorkshire Wolds in a prominent escarpment, south of the Vale of Pickering. The beds of the Chalk Group were deposited over the buried northwestern margin of the Anglo-Brabant Massif during the Late Cretaceous.<ref name="Rawson" /> During this time, sources for siliciclastic sediment had been eliminated due to the exceptionally high sea level.<ref name="Anderson" /> The formation is thinner through the Chiltern Hills than the chalk strata to the north and south and deposition was tectonically controlled, with the Lilley Bottom structure playing a significant role at times.<ref name="Rawson">Rawson, P.F. 2006. Cretaceous: sea levels peak as the North Atlantic opens. In: P.J. Brenchley and P.F. Rawson (Eds) The Geology of England and Wales, p.365-393. The Geological Society Template:ISBN</ref> The base of the Chalk Group, like the underlying Gault Clay and Upper Greensand, is diachronous.<ref name="Anderson">Anderson, R., P.H. Bridges, M.R. Leeder and B.W. Sellwood (Eds) 1979. A Dynamic Stratigraphy of the British Isles: A Study in Crustal Evolution. p. 241. George Allen and Unwin, London. Template:ISBN</ref>

During the late stages of the Alpine Orogeny, as the African Plate collided with Eurasian Plate, Mesozoic extensional structures, such as the Weald Basin of southern England, underwent structural inversion.<ref name="Rawson" /> This phase of deformation tilted the chalk strata to the southeast in the area of the Chiltern Hills. The gently dipping beds of rock were eroded, forming an escarpment.

The chalk strata are frequently interspersed with layers of flint nodules which apparently replaced chalk and infilled pore spaces early in the diagenetic history. Flint has been mined for millennia from the Chiltern Hills.<ref>Template:Cite book</ref> They were first extracted for fabrication into flint axes in the Neolithic period, then for knapping into flintlocks. Nodules are to be seen everywhere in the older houses as a construction material for walls.

Physical characteristicsEdit

TopographyEdit

File:Ivinghoe Beacon seen from The Ridgeway.jpg
Viewed from The Ridgeway: eastern trailhead on Ivinghoe Beacon

The highest point is at 267 m (876 ft.) above sea level at Haddington Hill near Wendover in Buckinghamshire; a stone monument marks the summit. The nearby Ivinghoe Beacon is a more prominent hill, although its altitude is only 249 m (817 ft.).<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It is the starting point of the Icknield Way Path and the Ridgeway long-distance path, which follows the line of the Chilterns for many miles to the west, where they merge with the Wiltshire downs and southern Cotswolds. To the east of Ivinghoe Beacon is Dunstable Downs, a steep section of the Chiltern scarp. Near Wendover is Coombe Hill, 260 m (852 ft.) above sea level. The more gently sloping country – the dip slope – to the southeast of the Chiltern scarp is also generally referred to as part of the Chilterns; it contains much beech woodland<ref name=EB1911/> and many villages. Template:Further

Landscape and land useEdit

Enclosed fields account for almost 66% of the "Area of Outstanding Natural Beauty" (AONB) area. The next most important, and archetypal, landscape form is woodland, covering 21% of the Chilterns, which is thus one of the most heavily wooded areas in England. Built-up areas (settlements and industry) make up over 5% of the land area; parks and gardens nearly 4%, open land (commons, heaths and downland) is 2%, and the remaining 2% includes a variety of uses, including communications, military, open land, recreation, utilities and water.<ref name=changelandscape/>

RiversEdit

The Chilterns are almost entirely located within the River Thames drainage basin, and also drain towards several major Thames tributaries, most notably the Lea, which rises in the eastern Chilterns, the Colne to the south, and the Thame to the north and west. Other rivers arising near the Chilterns include the Mimram, the Ver, the Gade, the Bulbourne, the Chess, the Misbourne and the Wye. These are classified as chalk streams, although the Lea is degraded by water from road drains and sewage treatment works.<ref>B.S. Nau, C. R. Boon, and J. P. Knowles, Bedfordshire Wildlife, Castlemead, 1987, Template:ISBN, page 71.</ref> The Thames flows through a gap between the Berkshire Downs and the Chilterns. Portions around Leighton Buzzard and Hitchin are drained by the Ouzel, the Flit and the Hiz, all of which ultimately flow into the River Great Ouse (the last two via the Ivel).

TransportEdit

File:M40 - Chiltern Cutting - Stokenchurch.jpg
Stokenchurch Gap, a cutting built to carry the M40 motorway through a section of the Chilterns

Several transport routes pass through the Chilterns in natural or human-made corridors. There are also over Template:Convert of public footpaths in the Chilterns, including long-distance trackways such as the Icknield Way and The Ridgeway.<ref name=didyouknow>DidYouKnow.pdfTemplate:Dead link Chilterns AoNB, Accessed 19 February 2012</ref> The M40 motorway passes through the Chilterns in Buckinghamshire and Oxfordshire sections with a deep cutting through the Stokenchurch Gap. The M1 motorway crosses the Bedfordshire section near Luton. Other major roads include the A41 and the A413.

The Chiltern Main Line Railway via High Wycombe and Princes Risborough, the London to Aylesbury Line via Template:Stnlnk, the West Coast Main Line via Berkhamsted, and the Midland Main Line all run through the Chiltern Hills. The Great Western Main Line and its branches such as the Henley and Marlow branch lines link the southern side of the Chilterns with London Paddington. The Chinnor and Princes Risborough Railway is a preserved line.

High Speed 2 (HS2) will pass underneath the Chilterns in the Chiltern tunnel. This tunnel, the longest under construction on the HS2 route, will be Template:Convert in length.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The Conservation Board has made clear it was opposed to the routing of HS2 through the Chilterns AONB.<ref>Chilterns Conservation Board – statement objecting to HS2, Accessed 12 December 2012</ref><ref>Chilerns AoNB website – HS2, Accessed 20 February 2012</ref>

Bus services are provided by Arriva Shires & Essex and Carousel Buses. Air corridors from Luton Airport pass over the Chilterns.

Apart from the River Thames, there are no navigable rivers. The Grand Union Canal passes through the Chilterns between Berkhamsted and Marsworth following the course of the Gade and Bulbourne. Also, after crossing a watershed, the Ouzel is partly in the Chilterns.

HistoryEdit

File:Nettle bed kiln (small).JPG
Bottle kiln, Nettlebed, probably from the late 17th century
File:Watlington townhall2.jpg
Watlington Town Hall

During the Iron Age, the Chiltern ridge provided a relatively safe and easily navigable route across southern Britain. The toponym, Chiltern, is believed to be Brittonic in origin. According to Eilert Ekwall, Chiltern is possibly related to the broader ethnic name Celt (Celtæ in early Celtic languages); the root celto- "high" (and suffix -erno-) could provide the origin of Chiltern.<ref>Template:Cite book Ekwall cites the forms Cilternsætna ( Birch's Cartularium Saxonicum; 297); Cilternes efes ( Kemble's Codex diplomaticus aevi Saxonici; 715) and Ciltern (Anglo-Saxon Chronicle; text E)</ref>

Before the 18th century, the population lived dispersed across the largely rural landscape of the Chilterns in remote villages, hamlets, farmsteads, and market towns along the main turnpike routes which coursed through the navigable valleys. The development of canals in the 18th century and railways in the 19th century encouraged settlement and the growth of High Wycombe, Tring, and Luton. Significant housing and industrial development took place in the first half of the 20th century and continued throughout the 20th century.

In 1965 almost half of the Chiltern Hills was designatedTemplate:Cn as an Area of Outstanding Natural Beauty (AONB).

List of towns and villages in the ChilternsEdit

Strip parishes associated with the ChilternsEdit

The western edge of the Chilterns is notable for ancient strip parishes, elongated parishes with villages in the flatter land below the escarpment, and woodland and summer pastures in the higher land.<ref name="HeppleDoggett">Template:Cite book</ref>

Economic useEdit

The hills have been used for their natural resources for millennia. The chalk has been quarried for the manufacture of cement, and flint for local building material. Beechwoods supplied furniture makers with quality hardwood.<ref name=EB1911/> The area was once (and still is to a lesser degree) renowned for its chair-making industry,<ref name=EB1911/> centred on the towns of Chesham and High Wycombe (the nickname of Wycombe Wanderers Football Club is the Chairboys). Water was and remains a scarce resource in the Chilterns. Historically it was drawn from the aquifer via ponds, deep wells, occasional springs or bournes and chalk streams and rivers. The River Chess directly supplies watercress beds. Today the chalk aquifer is exploited via a network of pumping stations to provide a public supply for domestic consumption, agriculture and business uses, both within and well-beyond the Chilterns area. Over-exploitation has possibly led to the disappearance of some streams over long periods.<ref>Chess Valley Association, Accessed 4 September 2014</ref>

In a region without building stone, local clay provided the raw materials for brick manufacture. Timber and flint were also used for construction.

Mediaeval strip parishes reflected the diversity of land from clay farmland, through wooded slopes to downland. Their boundaries were often drawn to include a section of each type of land, resulting in an irregular county boundary. These have tended to be smoothed out by successive reorganisations.

As people have come to appreciate the open country, the area has become a visitor destination and the National Trust has acquired land to preserve its character, for example at Ashridge, near Tring. In places, with the reduction of sheep grazing, action has been taken to maintain open downland by suppressing the natural growth of scrub and birch woodland. In the 1920s and 1930s, the Youth Hostels Association established several youth hostels for people visiting the hills.

The hills have been used as a location for telecommunication relay stations such as Stokenchurch BT Tower and that at Zouches Farm.

ProtectionEdit

File:Leagrave Cottages, Chiltern Open Air Museum (geograph 5576500 by Mark Percy).jpg
Vernacular architecture of the Chilterns is preserved at the Chiltern Open Air Museum

The Chilterns are an Area of Outstanding Natural Beauty (AONB) and so enjoys special protection from major developments, which should not take place in such areas except in exceptional circumstances. This protection applies to major development proposals that raise issues of national significance.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> In 2000 the government confirmed that the landscape qualities of AONBs are equivalent to those of National Parks, and that the protection given to both types of area by the land use planning system should also be equivalent.

Chilterns Conservation BoardEdit

The Chilterns Conservation Board was established by Parliamentary Order in July 2004. It is an independent body comprising 27 members drawn from the relevant local authorities and from those living in local communities within the Chiltern AONB area.

The Board's purposes are set out in Countryside and Rights of Way Act 2000: In summary these are:- First, to conserve and enhance the natural beauty of the AONB, and increase the understanding and enjoyment by the public of the special qualities of the AONB. Second, while taking account of the first purpose, to foster the economic and social wellbeing of local communities within the AONB. Third, to publish and promote the implementation of a management plan for the AONB.<ref>Chiltern Conservation Board – Our Role Template:Webarchive, Accessed 10 December 2012</ref>

In contrast to National Parks, The Chilterns – as other AONBs – do not possess their own planning authority. The Board has an advisory role on planning and development matters and seeks to influence the actions of local government by commenting upon planning applications.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The local authorities (two County Councils, three Unitary Authorities and four District and Borough Councils) are expected to respect the area's status as a designated Area of Outstanding Natural Beauty.

HeritageEdit

Examples of historical architecture in the Chiltern region are preserved at the Chiltern Open Air Museum near Chalfont St Giles. This open-air folk museum contains reconstructed buildings which might otherwise have been destroyed or demolished as a result of redevelopment or road construction.<ref name="coam-historic-buildings">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name="Matthews">Template:Cite book</ref>

Chiltern HundredsEdit

{{#invoke:Labelled list hatnote|labelledList|Main article|Main articles|Main page|Main pages}} The Chilterns include the Chiltern Hundreds. By established custom, Members of Parliament (MPs) in the House of Commons of the United Kingdom, who are prohibited from resigning their seats directly, may apply for the Stewardship of the Chiltern Hundreds as a device to enable their departure from the House.Template:Cn

List of hillsEdit

Hills in The Chilterns National Landscape with more than 30 metres of topographic prominence are listed from southwest to northeast.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Hill Elevation (m) Prominence (m) OS grid reference
Wendover Woods 267.5 180 SP890090
Coombe Hill 260 108 SP849066
Bald Hill 257.2 125 SU728957
Clipper Down 249 123 SP965151
Pulpit Hill 248 55 SP831050
Whiteleaf Hill 247.3 63 SP823034
Dunstable Downs 243 105 TL008194
Beacon Hill 230 33 SP835060
Aldbury Nowers 222 42 SP952136
Blow's Down 212 48 TL034214
Lodge Hill 209 45 SP794000
Widdenton Park Hill 200.2 30.5 SU817917
Warden Hill 195 68 TL091260
Telegraph Hill 184 45 TL118288
Bradenham Hill 182.3 48.7 SU815971
Frieth Hill 179 36 SU792906
Slough Hill 171 30 SU808979

See alsoEdit

ReferencesEdit

Template:Reflist

External linksEdit

Template:AONBs in England Template:High Speed 2 articles

Template:Authority control

Retrieved from "https://zalansite.site/mediawiki/index.php?title=Chiltern_Hills&oldid=190253"