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Amojjar Pass
Amojjar Pass is a mountain pass in the Adrar Plateau in the centre of Adrar, near Atar, Mauritania. The pink-brown sandstone of the pass was worn away by repeated cycles of extreme dryness interrupted by torrential rain. The bases of the steep valley walls are covered in scree, loosed by the erosion of the rainfall. There is little plant life in the pass. Acacias are a notable exception, as they are resistant to drought. Amojjar Pass is an important link for ground transportation in Mauritania because it provides a somewhat protected roadway connecting Mauritania's capital, Nouakchott, with other important locations such as Ouadane and Chinguetti. The Neolithic The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several p ... rock paintings of Agrour Amogjar are near the pass, northeast of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atar, Mauritania
Atar ( ar, أطار, Berber for ''mountain'') is a town in northwestern Mauritania, the capital of the Adrar Region and the main settlement on the Adrar Plateau. Situated on the oued Seguellil, it is home to an airport, a museum and a historic mosque, constructed in 1674. In 2013 it had a population of 25,190. Geology and geography The Adrar's mountains are from the primary era against the precambrian Tiris Zemmour. Near Atar, you can find stromatolites. In the North, you can find Choum with the train that comes from Nouadhibou and goes to Zouerate. East of Atar, through Amojjar Pass, is the difficult way to Chinguetti, Ouadane and the astonishing Richat Structure. Climate Atar has a hot desert climate ( Köppen climate classification ''BWh'') typical of the Sahara Desert, south of the tropic of Cancer. The weather is usually very hot, very sunny and very dry but it can be overcast sometimes. The annual average temperature is close to 30 °C (86 °F), meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transport In Mauritania
Citizens of Mauritania have various transportation methods. Railways and highways connect major cities in the country. Mauritania is a coastal country so there are many ports along its coast and there are a few big rivers that run through the country. Lastly, there are 26 airports spread out throughout the country. Railways *717 km total of single track (standard gauge), owned and operated by a government mining company, Société Nationale Industrielle et Minière (National Mining and Industrial Company, SNIM). The railway goes from the mines at Zouerat and El Rhein, passes another mine at Fderik, and ends at the port of Nouadhibou/Cansado. *One of the world's longest trains (up to 2.5 km long) runs here, with more than 200 wagons mainly transporting iron ore, and some carriages for passengers; alternatively, people sit on top of the iron piles. There are no rail links with adjacent countries. In 2008, a railway was proposed that would link Nouakchott with Tig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Passes Of Mauritania
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 than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrour Amogjar
The Agrour Amogjar is a 690 m high peak near the Amogjar Pass, in the Adrar plateau of central Mauritania. Its small natural shelters house a rich collection of rock painting In archaeology, rock art is human-made markings placed on natural surfaces, typically vertical stone surfaces. A high proportion of surviving historic and prehistoric rock art is found in caves or partly enclosed rock shelters; this type also ...s in a damaged state. An enclosure protects some of the shelters and access is subject to a fee. Rock paintings The set of rock paintings is heterogeneous. Eight stylistic groups have been recorded, ranging from the "pastoral" period to the most recent graffiti. The panels are featuring geometric circles with sunburst design, handprints, naturalistic wildlife such as giraffe, lion and crocodile, as well as herds of cattle and human collective scenes. The most important set is a frieze of dancers.Robert Vernet, Les peintures rupestres du haut de la passe d'Amogj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic
The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts of the world. This "Neolithic package" included the introduction of farming, domestication of animals, and change from a hunter-gatherer lifestyle to one of settlement. It began about 12,000 years ago when farming appeared in the Epipalaeolithic Near East, and later in other parts of the world. The Neolithic lasted in the Near East until the transitional period of the Chalcolithic (Copper Age) from about 6,500 years ago (4500 BC), marked by the development of metallurgy, leading up to the Bronze Age and Iron Age. In other places the Neolithic followed the Mesolithic (Middle Stone Age) and then lasted until later. In Ancient Egypt, the Neolithic lasted until the Protodynastic period, 3150 BC.Karin Sowada and Peter Grave. Egyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinguetti
Chinguetti () ( ar, شنقيط, translit=Šinqīṭ) is a ksar and a medieval trading center in northern Mauritania, located on the Adrar Plateau east of Atar. Founded in the 13th century as the center of several trans-Saharan trade routes, this small city continues to attract a handful of visitors who admire its spare architecture, scenery, and ancient libraries. The city is seriously threatened by the encroaching desert; high sand dunes mark the western boundary and several houses have been abandoned to the sand. The town is split in two by a wadi. On one side, there is the old sector, and on the other the new one. The indigenous Saharan architecture of older sectors of the city features houses constructed of reddish dry-stone and mud-brick techniques, with flat roofs timbered from palms. Many of the older houses feature hand-hewn doors cut from massive ancient acacia trees, which have long disappeared from the surrounding area. Many homes include courtyards or patios that crow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ouadane
, settlement_type = Commune and town , image_skyline = OuadaneOldTown1.jpg , imagesize = , image_caption = Old tower, Ouadane , image_flag = , image_seal = , image_map = , map_caption = , pushpin_map = Mauritania , pushpin_label_position = bottom , pushpin_mapsize = , pushpin_map_caption = Location in Mauritania , subdivision_type = Country , subdivision_type1 = Region , subdivision_name = Mauritania , subdivision_name1 = Adrar Region , subdivision_type2 = , subdivision_name2 = , established_title = , established_date = , government_type = , leader_title = , leader_name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nouakchott
, image_skyline = Nouakchott.jpg , image_caption = City view of Nouakchott , pushpin_map = Mauritania#Arab world#Africa , pushpin_relief = 1 , mapsize = , map_caption = Map of Mauritania showing Nouakchott , subdivision_type = Country , subdivision_name = , subdivision_type1 = Capital district , subdivision_name1 = Nouakchott , leader_title = Council president , leader_name = Fatimatou Abdel Malick , population_as_of = 2019 census , population_total = 1,195,600 , area_total_km2 = 1000 , population_density_km2 = auto , area_total_sq_mi = 400 , coordinates = , coordinates_footnotes = , elevation_m = 7 , elevation_ft = , website = , settlement_type = Capital city Nouakchott (; ; ar, نواكشوط; ber, label=Berber, itali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drought
A drought is defined as drier than normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, and O. Zolina, 2021Water Cycle Changes In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 1055–1210, doi:10.1017/9781009157896.010. This means that a drought is "a moisture deficit relative to the average water availability at a given location and season". A drought can last for days, months or years. Drought ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mauritania
Mauritania (; ar, موريتانيا, ', french: Mauritanie; Berber: ''Agawej'' or ''Cengit''; Pulaar: ''Moritani''; Wolof: ''Gànnaar''; Soninke:), officially the Islamic Republic of Mauritania ( ar, الجمهورية الإسلامية الموريتانية), is a sovereign country in West Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast, Mali to the east and southeast, and Senegal to the southwest. Mauritania is the 11th-largest country in Africa and the 28th-largest in the world, and 90% of its territory is situated in the Sahara. Most of its population of 4.4 million lives in the temperate south of the country, with roughly one-third concentrated in the capital and largest city, Nouakchott, located on the Atlantic coast. The country's name derives from the ancient Berber kingdom of Mauretania, located in North Africa within the ancient Maghreb. Berbers occupied what is now Mauritani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia
''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus name is New Latin, borrowed from the Greek (), a term used by Dioscorides for a preparation extracted from the leaves and fruit pods of '' Vachellia nilotica'', the original type of the genus. In his ''Pinax'' (1623), Gaspard Bauhin mentioned the Greek from Dioscorides as the origin of the Latin name. In the early 2000s it had become evident that the genus as it stood was not monophyletic and that several divergent lineages needed to be placed in separate genera. It turned out that one lineage comprising over 900 species mainly native to Australia, New Guinea, and Indonesia was not closely related to the much smaller group of African lineage that contained ''A. nilotica''—the type species. This meant that the Australasian lineage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scree
Scree is a collection of broken rock fragments at the base of a cliff or other steep rocky mass that has accumulated through periodic rockfall. Landforms associated with these materials are often called talus deposits. Talus deposits typically have a concave upwards form, where the maximum inclination corresponds to the angle of repose of the mean debris particle size. The exact definition of scree in the primary literature is somewhat relaxed, and it often overlaps with both ''talus'' and ''colluvium''. The term ''scree'' comes from the Old Norse term for landslide, ''skriða'', while the term ''talus'' is a French word meaning a slope or embankment. In high-altitude arctic and subarctic regions, scree slopes and talus deposits are typically adjacent to hills and river valleys. These steep slopes usually originate from late-Pleistocene periglacial processes. Notable scree sites in Eastern North America include the Ice Caves at White Rocks National Recreation Area in southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
