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A hill is a landform that extends above the surrounding terrain. It often has a distinct summit, although in areas with scarp or dip topography a hill may refer to the particular section of flat terrain without a massive summit (notably Box Hill, Surrey).
In the United Kingdom, geographers historically regarded mountains as hills greater than 1,000 feet (304.8 meters) above sea level, which formed the basis of the plot of the 1995 film The Englishman Who Went Up a Hill But Came Down a Mountain. In contrast, hillwalkers have tended to regard mountains as peaks 2,000 feet (610 m) above sea level: the Oxford English Dictionary also suggests a limit of 2,000 feet (610 m) and Whittow states "Some authorities regard eminences above 600 m (1,969 ft) as mountains, those below being referred to as hills." Today, a mountain is usually defined in the UK and Ireland as any summit at least 2,000 feet or 610 meters high, while the official UK government's definition of a mountain is a summit of 600 meters (1,969 feet) or higher. Some definitions include a topographical prominence requirement, typically 100 feet (30.5 m) or 500 feet (152.4 m). In practice, mountains in Scotland are frequently referred to as "hills" no matter what their height, as reflected in names such as the Cuillin Hills and the Torridon Hills. In Wales, the distinction is more a term of land use and appearance and has nothing to do with height.
For a while, the U.S. defined a mountain as being 1,000 feet (304.8 m) or more tall. Any similar landform lower than this height was considered a hill. The United States Geological Survey (USGS), however, has concluded that these terms do not in fact have technical definitions in the U.S.
A hillock is a small hill. Other words include knoll and (in Scotland, Northern Ireland and northern England) its variant, knowe. Artificial hills may be referred to by a variety of technical names, including mound and tumulus.
Hills may form through geomorphic phenomena: faulting, erosion of larger landforms such as mountains and movement and deposition of sediment by glaciers (notably moraines and drumlins or by erosion exposing solid rock which then weathers down into a hill). The rounded peaks of hills results from the diffusive movement of soil and regolith covering the hill, a process known as downhill creep.
Various names used to describe types of hill, based on appearance and method of formation. Many such names originated in one geographical region to describe a type of hill formation peculiar to that region, though the names are often adopted by geologists and used in a wider geographical context. These include:
- Brae – Scottish term for a hillside or brow of a hill.
- Drumlin – an elongated whale-shaped hill formed by glacial action.
- Butte – an isolated hill with steep sides and a small flat top, formed by weathering.
- Kuppe – a rounded hill or low mountain, typical of central Europe
- Tor – a rock formation found on a hilltop; also used to refer to the hill, especially in South West England.
- Puy – used especially in the Auvergne, France, to describe a conical volcanic hill.
- Pingo – a mound of earth-covered ice found in the Arctic and Antarctica.
Many settlements were originally built on hills, either to avoid floods (particularly if they were near a large body of water), or for defense (since they offer a good view of the surrounding land and require would-be attackers to fight uphill), or to avoid densely forested areas. For example, Ancient Rome was built on seven hills, protecting it from invaders.
Some settlements, particularly in the Middle East, are located on artificial hills consisting of debris (particularly mud bricks) that has accumulated over many generations. Such a location is known as a "tell".
In northern Europe, many ancient monuments are sited in heaps.[clarification needed] Some of these are defensive structures (such as the hill-forts of the Iron Age), but others appear to have hardly any significance. In Britain, many churches at the tops of hills are thought to have been built on the sites of earlier pagan holy places. The National Cathedral in Washington, DC has followed this tradition and was built on the highest hill in that city.
Hills provide a major advantage to an army, giving them an elevated firing position and forcing an opposing army to charge uphill to attack them. They may also conceal forces behind them, allowing a force to lie in wait on the crest of a hill, using that crest for cover, and firing on unsuspecting attackers as they broach the hilltop. As a result, conventional military strategies often demand possession of high ground.
Hills have been the sites of many noted battles, such as the first recorded military conflict in Scotland known as the battle of Mons Graupius. Modern conflicts include the Battle of Bunker Hill (which was actually fought on Breed's Hill) in the American War of Independence and Cemetery Hill and Culp's Hill in the Battle of Gettysburg, the turning point of the American Civil War.
The Battle of San Juan Hill in the Spanish–American War won Americans control of Santiago. The Battle of Alesia was also fought from a hilltop fort. Fighting on Mamayev Kurgan during the Battle of Stalingrad and the Umurbrogol Pocket in the Battle of Peleliu were also examples of bloody fighting for high ground. Another recent example is the Kargil War between India and Pakistan. The Great Wall of China is also an example of an advantage provider. It is built on mountain tops, and was meant to defend against invaders from the north, and among others, Mongolians.
Sports and games
Hillwalking is a British English term for a form of hiking which involves the ascent of hills. The activity is usually distinguished from mountaineering as it does not involve ropes or technically difficult rock climbing, although the terms mountain and hill are often used interchangeably in Britain. Hillwalking is popular in hilly areas such as the English Peak District and the Scottish Highlands. Many hills are categorized according to relative height or other criteria and feature on lists named after mountaineers, such as Munros (Scotland) and Wainwrights (England). Specific activities such as "peak bagging" (or "Munro bagging") involve climbing hills on these lists with the aim of eventually climbing every hill on the list.
Cheese rolling is an annual event in the West Country of England which involves rolling a wheel of cheese down a hill. Contestants stand at the top and chase the wheel of cheese to the bottom. The winner, the one who catches the cheese, gets to keep the wheel of cheese as a prize.
Largest artificial hills
- Sophienhöhe, Germany (200 m (660 ft))
- Kvarntorpshögen, Sweden (100 m (330 ft))
- Mausoleum of the First Qin Emperor, China (76 m (249 ft))
- Five Sisters Bing, Scotland (70 m (230 ft))
- Expedition Everest, Florida (61 m (200 ft))
- Monte Stella, Italy (45 m (148 ft))
- Blackstrap Ski Hill, Canada (45 m (148 ft))
- Jingshan Hill, China (45 m (148 ft))
- Silbury Hill, England (40 m (130 ft))
- Grizzly Peak, California (34 m (112 ft))
- Mount Manisty, England (30 m (100 ft))
- Monks Mound, Illinois (30 m (98 ft))
- Mount Gushmore, Florida (27 m (89 ft))
- Abyssal hill – A small hill that rises from the floor of an abyssal plain
- Breast-shaped hill
- Crag and tail
- Dune – A hill of loose sand built by aeolian processes or the flow of water
- Hill Country
- Hillock – A small hill
- Hill station
- "Jack and Jill – Nursery rhyme"
- Kame – Mound formed on a retreating glacier and deposited on land
- King of the Hill
- List of hills
- Mesa – Elevated area of land with a flat top and sides that are usually steep cliffs
- Mound – Artificial heaped pile of earth, gravel, sand, rocks, or debris
- Tell – Ancient settlement mound
- Witch of Agnesi – mathematical curve
- Whittow, John (1984). Dictionary of Physical Geography. London: Penguin, 2004, p. 352. ISBN 0-14-051094-X.
- Nuttall, John & Anne (2008). The Mountains of England & Wales - Volume 2: England (3rd ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-037-4.
- "Survey turns hill into a mountain". BBC News. 18 September 2008. Retrieved 3 February 2013.
- "A Mountain is a Mountain - isn't it?". www.go4awalk.com. Retrieved 3 February 2013.
- mountain at dictionary.reference.com. Accessed on 3 February 2013.
- Wilson, Peter (2001). ‘’Listing the Irish hills and mountains’’ in ‘’Irish Geography’’, Vol 34(1), University of Ulster, Coleraine, p. 89.
- What is a “Mountain”? Mynydd Graig Goch and all that… Archived 30 March 2013 at the Wayback Machine at Metric Views. Accessed on 3 February 2013.
- "Rolling Hills". www.eso.org. Retrieved 12 December 2016.
- "What is the Difference Between a Mountain and a Hill?". www.wisegeek.com. Retrieved 3 February 2013.
- Hill at the Great Soviet Encyclopedia.
- Knowe, Random House Dictionary at dictionary.com
- Wilkinson, T.J. Archaeological landscapes of the near east. Tucson: U of Arizona P, 2003, 226.
- "Blackstrap Provincial Park". Government of Saskatchewan. Retrieved 19 February 2011.
- "The Very Large Telescope". Telescopes and Instruments. ESO. Retrieved 10 August 2011.
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