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Cirque De Navacelles
210px, Here the magnificence of the valley is shown. The river's meandering erosion is clear. The Cirque de Navacelles is large erosional landform, an incised meander, located towards the southern edge of the Massif Central mountain range in France. It is located near Saint-Maurice-Navacelles and Blandas between the Hérault department and the Gard department. The cirque is isolated, with only a few small villages in the surrounding area. However, with the completion of the Millau Viaduct in 2004 and the A75 motorway between Clermont-Ferrand and Pézenas, tourism in the region has increased. Fluvial processes in the cirque The area is an example of a dissected plateau in which the Vis River eroded a deep channel through the base of the valley, creating an incised meander which eventually eroded through creating a cut-off at the neck of the loop. This left an oxbow lake which later dried up, leaving deposits of silt and peat. This created what is the only patch of arable l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clermont-Ferrand
Clermont-Ferrand (, ; ; oc, label=Auvergnat, Clarmont-Ferrand or Clharmou ; la, Augustonemetum) is a city and commune of France, in the Auvergne-Rhône-Alpes region, with a population of 146,734 (2018). Its metropolitan area (''aire d'attraction'') had 504,157 inhabitants at the 2018 census.Comparateur de territoire: Aire d'attraction des villes 2020 de Clermont-Ferrand (022), Unité urbaine 2020 de Clermont-Ferrand (63701), Commune de Clermont-Ferrand (63113) INSEE It is the prefecture (capital) of the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirques Of Metropolitan France
A (; from the Latin word ') is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from Scottish Gaelic , meaning a pot or cauldron) and (; ). A cirque may also be a similarly shaped landform arising from fluvial erosion. The concave shape of a glacial cirque is open on the downhill side, while the cupped section is generally steep. Cliff-like slopes, down which ice and glaciated debris combine and converge, form the three or more higher sides. The floor of the cirque ends up bowl-shaped, as it is the complex convergence zone of combining ice flows from multiple directions and their accompanying rock burdens. Hence, it experiences somewhat greater erosion forces and is most often overdeepened below the level of the cirque's low-side outlet (stage) and its down-slope (backstage) valley. If the cirque is subject to seasonal melting, the floor of the cirque most often forms a tarn (small lake) behind a dam, which marks the down ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Causse De Blandas
Causse de Blandas is a limestone karst plateau in the south of the Massif Central in the Gard department, in southern France. Geography The communes of causse de Blandas are: *Blandas * Montdardier * Rogues See also * Causses * cirque de Navacelles 210px, Here the magnificence of the valley is shown. The river's meandering erosion is clear. The Cirque de Navacelles is large erosional landform, an incised meander, located towards the southern edge of the Massif Central mountain range in Fran ... * Vis river Landforms of Gard Plateaus of Metropolitan France {{Gard-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meander
A meander is one of a series of regular sinuous curves in the channel of a river or other watercourse. It is produced as a watercourse erodes the sediments of an outer, concave bank ( cut bank) and deposits sediments on an inner, convex bank which is typically a point bar. The result of this coupled erosion and sedimentation is the formation of a sinuous course as the channel migrates back and forth across the axis of a floodplain. The zone within which a meandering stream periodically shifts its channel is known as a meander belt. It typically ranges from 15 to 18 times the width of the channel. Over time, meanders migrate downstream, sometimes in such a short time as to create civil engineering challenges for local municipalities attempting to maintain stable roads and bridges.Neuendorf, K.K.E., J.P. Mehl Jr., and J.A. Jackson, J.A., eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. Charlton, R., 2007. ''Fundamen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirque De Navacelles
210px, Here the magnificence of the valley is shown. The river's meandering erosion is clear. The Cirque de Navacelles is large erosional landform, an incised meander, located towards the southern edge of the Massif Central mountain range in France. It is located near Saint-Maurice-Navacelles and Blandas between the Hérault department and the Gard department. The cirque is isolated, with only a few small villages in the surrounding area. However, with the completion of the Millau Viaduct in 2004 and the A75 motorway between Clermont-Ferrand and Pézenas, tourism in the region has increased. Fluvial processes in the cirque The area is an example of a dissected plateau in which the Vis River eroded a deep channel through the base of the valley, creating an incised meander which eventually eroded through creating a cut-off at the neck of the loop. This left an oxbow lake which later dried up, leaving deposits of silt and peat. This created what is the only patch of arable l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficient carbon sink on the planet, because peatland plants capture carbon dioxide (CO2) naturally released from the peat, maintaining an equilibrium. In natural peatlands, the "annual rate of biomass production is greater than the rate of decomposition", but it takes "thousands of years for peatlands to develop the deposits of , which is the average depth of the boreal orthernpeatlands", which store around 415 gigatonnes (Gt) of carbon (about 46 times 2019 global CO2 emissions). Globally, peat stores up to 550 Gt of carbon, 42% of all soil carbon, which exceeds the carbon stored in all other vegetation types, including the world's forests, although it covers just 3% of the land's surface. ''Sphagnum'' moss, also called peat moss, is one of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silt
Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt also can be felt by the tongue as granular when placed on the front teeth (even when mixed with clay particles). Silt is a common material, making up 45% of average modern mud. It is found in many river deltas and as wind-deposited accumulations, particularly in central Asia, north China, and North America. It is produced in both very hot climates (through such processes as collisions of quartz grains in dust storms) and very cold climates (through such processes as glacial grinding of quartz grains.) Loess is soil rich in silt which makes up some of the most fertile agricultural land on Earth. However, silt is very vulnerable to erosion, and it has poor mechanical properties, making constr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxbow Lake
An oxbow lake is a U-shaped lake or pool that forms when a wide meander of a river is cut off, creating a free-standing body of water. In South Texas, oxbows left by the Rio Grande are called '' resacas''. In Australia, oxbow lakes are called billabongs. The word "oxbow" can also refer to a U-shaped bend in a river or stream, whether or not it is cut off from the main stream. Geology An oxbow lake forms when a meandering river erodes through the neck of one of its meanders. This takes place because meanders tend to grow and become more curved over time. The river then follows a shorter course that bypasses the meander. The entrances to the abandoned meander eventually silt up, forming an oxbow lake. Because oxbow lakes are stillwater lakes, with no current flowing through them, the entire lake gradually silts up, becoming a bog or swamp and then evaporating completely. When a river reaches a low-lying plain, often in its final course to the sea or a lake, it meanders w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vis River
The Vis is a river in south-central France, in the Occitanie administrative region. It is a right tributary of the Hérault. Its source is in the Cévennes, near the village of Alzon. It flows between the Causse du Larzac and the Causse de Blandas into the Hérault and Gard departments. The Vis flows into the Hérault near Ganges. Origin of the name The name "Vis" derives from the old Proto-Indo-European root "Vir" which means "river", and which can be found in the name of many rivers in France such as the Vire. Towns along the river The Vis flows through the following communes from source to mouth: * Arrigas * Alzon * Campestre-et-Luc * Blandas * Vissec * Saint-Maurice-Navacelles * Rogues * Gorniès * Saint-Laurent-le-Minier * Saint-Julien-de-la-Nef * Cazilhac Hydrology and water quality The Vis takes its source on the Saint-Guiral mount. See also * Cirque de Navacelles 210px, Here the magnificence of the valley is shown. The river's meandering erosion is clear. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dissected Plateau
A dissected plateau is a plateau area that has been severely eroded such that the relief is sharp. Such an area may be referred to as mountainous, but dissected plateaus are distinguishable from orogenic mountain belts by the lack of folding, metamorphism, extensive faulting, or magmatic activity that accompanies orogeny. Formation A dissected plateau may also be formed, or created, usually on a comparatively small scale, by the levelling of terrain by planing and deposition beneath an ice sheet or perhaps, an ice cap. Subsequently, during the same or a later glacial, the margins of the glacial till plain are removed by glaciers, leaving the plateau into which erosion by water incises valleys. Such a plateau may be level or gently sloping but may be distinguished by the till caps on its hills. Glacial till is still widely known in Britain by the older name of boulder clay. Dissected volcanic plateaus include the Pajarito Plateau in New Mexico, on the skirt of the eno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pézenas
Pézenas (; Languedocien: ''Pesenàs'') is a commune in the Hérault department in the Occitanie region in southern France. Name The name "Pézenas" is derived from the older name ''Piscenae'', probably from the Latin word ''piscenis'', meaning fishpond. According to legend, there was a lake full of fish behind the château. Inhabitants of Pézenas are ''Piscenois''. Origins The origins of Pézenas are unclear, but were influenced by three factors: water from the River Peyne, an ancient pre-Roman route from Rodez to Saint-Thibéry and a defensive hill site. Population Sights Pézenas has had a protected area (''Secteur sauvegardé'') since June 1965 - the 14th created by the French Ministry of Culture. The ministry lists 118 historical edifices in Pézenas, more than 30 of which are protected after being classified "Historical Monuments". The main sights include: * The old town centre with narrow streets and Hôtel Privet or Mansions (rather grand Town Houses from the 16t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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