A hill chain, sometimes also hill ridge, is an elongated line of

hill A hill is a landform that extends above the surrounding terrain. It often has a distinct summit. Terminology The distinction between a hill and a mountain is unclear and largely subjective, but a hill is universally considered to be not a ...

s that usually includes a succession of more or less prominent hilltops, domed summits or ''

kuppen A ''Kuppe'' is the term used in German-speaking central Europe for a mountain or hill with a rounded summit that has no rock formation, such as a tor, on it. A range of such hills is called a ''Kuppengebirge''. In geology the term also refers ...

'', hill ridges and saddles and which, together with its associated lateral ridges and branches, may form a complex

topographic Topography is the study of the forms and features of land surfaces. The topography of an area may refer to the land forms and features themselves, or a description or depiction in maps. Topography is a field of geoscience and planetary scie ...

structure. It may occur within a hill range, within an area of low rolling hill country or on a

plain In geography, a plain is a flat expanse of land that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands ...

. It may link two or more otherwise distinct hill ranges. The transition from a hill chain to a

mountain chain A mountain chain is a row of high mountain summits, a linear sequence of interconnected or related mountains,Whittow, John (1984). ''Dictionary of Physical Geography''. London: Penguin, p 87. . or a contiguous ridge of mountains within a larger ...

is blurred and depends on regional definitions of a hill or

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher ...

. For example, in the UK and Ireland a mountain must officially be or higher, whereas in North America mountains are often (unofficially) taken as being high or more. The chain-like arrangement of hills in a chain is a consequence of their collective formation by

mountain building Mountain formation refers to the geological processes that underlie the formation of mountains. These processes are associated with large-scale movements of the Earth's crust (tectonic plates). Folding, faulting, volcanic activity, igneous intr ...

forces or

ice age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gre ...

earth movements. Hill chains generally have a uniform

geological Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other E ...

age, but may comprise several types of rock or

sediment Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand ...

. Hill chains normally form a

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

. They are crossed by roads that often use a natural saddle in the terrain.

Examples

* the Argonne hill chain, in

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

. * the Fläming south of Berlin in

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwee ...

. * the

Malvern Hills The Malvern Hills are in the English counties of Worcestershire, Herefordshire and a small area of northern Gloucestershire, dominating the surrounding countryside and the towns and villages of the district of Malvern. The highest summit aff ...

in central

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...

. * the ridge between the

Taunus The Taunus is a mountain range in Hesse, Germany, located north of Frankfurt. The tallest peak in the range is '' Großer Feldberg'' at 878 m; other notable peaks are '' Kleiner Feldberg'' (825 m) and '' Altkönig'' (798 m). The Taunus range spa ...

and Vogelsberg, which lies south of

Giessen Giessen, spelled Gießen in German (), is a town in the German state (''Bundesland'') of Hesse, capital of both the district of Giessen and the administrative region of Giessen. The population is approximately 90,000, with roughly 37,000 unive ...

and forms the watershed between the

Lahn The Lahn is a , right (or eastern) tributary of the Rhine in Germany. Its course passes through the federal states of North Rhine-Westphalia (23.0 km), Hesse (165.6 km), and Rhineland-Palatinate (57.0 km). It has its source i ...

valley and the

Wetterau The Wetterau is a fertile undulating tract, watered by the Wetter, a tributary of the Nidda River, in the western German state of Hesse, between the hilly province Oberhessen and the north-western Taunus mountains. Bettina von Arnim writes of ...

References

Literature

* _ (1940). ''Proceedings/Geologists' Association''. Vol. 51. * Bünz, Enno (2008). ''Ostsiedlung und Landesausbau in Sachsen''. Leipzig: LUV. * Leggiere, Michael V. (2007). ''The Fall of Napoleon'', Vol. 1. Cambridge: CUP.

External links

{{Authority control Landforms

Examples

See also

References

Literature

External links