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Tagant Plateau
The Tagant Plateau is located in eastern Mauritania, forming a stony part of the Sahara Desert. The Tagant Region, a national administrative division, is named after the plateau. Geography Some towns are located at the foot of the Tagant Plateau's slopes, which form cliffs in some places. Among these areas are Tichit, Moudjéria and Rachid. Tidjikdja lies on the Tagant itself. The Assaba Massif, where Late Ordovician glacial formations have been identified, is a southward prolongation of the Tagant plateau. The Aoukar, the dry basin of a former lake lies beyond of the southern escarpments of the Tagant Plateau. History Beginning in mid-17th century, migrants from the Adrar Plateau region moved in and displaced the native population of the Tagant Plateau. The Tartega Gueltas oasis is one of the few wetlands in the region where there were still desert crocodiles in 1976, but the population seems to have been last seen in 1996. See also *Dhar Tichitt *Geography of Mauritania ... [...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 Mauritania ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aoukar
Aoukar or Erg Aoukar () is a geological depression area of south eastern Mauritania. It is located between Kiffa and Néma, south of the Tagant Plateau. The Aoukar basin is a dry natural region of sand dunes and salt pans fringed by escarpments on its northern and eastern sides. History There was once vast reed-covered endorheic lake in the area, but it no longer exists. The former lake of Aoukar extended towards the area of Tichit, bordering the southern edge of the Tagant Plateau. Below the cliffs ''(dhars)'' facing the extinct lake remains of about 400 villages have been found. From east to west, Dhar Néma, Dhar Walata, Dhar Tichitt, and Dhar Tagant form a semicircular shape around the Hodh/Aoukar Depression, which, prior to 4000 BCE, was an area with lakes of considerable size, and, after 1000 BCE, was an area that had become increasingly dried. During the emergence of the Tichitt Tradition, it was an oasis area. The Tichitt Tradition of eastern Mauritania dates from 2200 BC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Mauritania
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Of Mauritania
Mauritania, a country in the western region of the continent of Africa, is generally flat, its 1,030,700 square kilometres forming vast, arid plains broken by occasional ridges and clifflike outcroppings. Mauritania is the world’s largest country lying entirely below an altitude of . It borders the North Atlantic Ocean, between Senegal and Western Sahara, Mali and Algeria. It is considered part of both the Sahel and the Maghreb. A series of scarps face southwest, longitudinally bisecting these plains in the center of the country. The scarps also separate a series of sandstone plateaus, the highest of which is the Adrar Plateau, reaching an elevation of . Spring-fed oases lie at the foot of some of the scarps. Isolated peaks, often rich in minerals, rise above the plateaus; the smaller peaks are called ''Guelbs'' and the larger ones ''Kedias''. The concentric Guelb er Richat is a prominent feature of the north-central region. Kediet ej Jill, near the city of Zouîrât, has an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dhar Tichitt
Dhar Tichitt is a Neolithic archaeological site located in the southwestern region of the Sahara Desert, in Mauritania. It is one of several settlement locations along the sandstone cliffs in the area. Dhar Tichitt, Dhar Walata, Dhar Néma, and Dhar Tagant are the sites which compose Tichitt culture. The cliffs were inhabited by farmers and pastoralists starting at around 4500 BP and lasted to around 2300 BP, or approximately 2500 to 500 BCE. This area is one of the oldest known archaeological occupation sites in the western part of Africa. About 500 stone settlements littered the region in the former savannah of the Sahara. In addition to herding livestock (e.g., cattle, sheep, goats), its inhabitants hunted, fished, collected wild grain, and grew bulrush millet. The inhabitants and creators of these settlements during these periods thought to have been ancestors of the Soninke people. Geography The climate of the Dhar Tichitt region today is very arid and hot. However, thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West African Crocodile
The West African crocodile, desert crocodile, or sacred crocodile (''Crocodylus suchus'') is a species of crocodile related to – and often confused with – the larger and more aggressive Nile crocodile (''C. niloticus''). Taxonomy Compared to the Nile crocodile, the West African crocodile is smaller: Adults are typically long, and maximum is perhaps . The species was named by Étienne Geoffroy Saint-Hilaire in 1807, who discovered differences between the skulls of a mummified crocodile and those of Nile crocodile (''C. niloticus''). This new species was, however, for a long time afterwards regarded as a Synonym (taxonomy), synonym of the Nile crocodile. In 2003, a study indicated that ''C. suchus'' was a valid species, and this was confirmed by several other studies in 2011–2015. Despite the long history of confusion, Genetics, genetic testing has revealed that the two are not particularly close. The closest relatives of the Nile crocodile are the ''Crocodylus'' species fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wetlands
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The primary factor that distinguishes wetlands from terrestrial land forms or Body of water, water bodies is the characteristic vegetation of aquatic plants, adapted to the unique anoxic hydric soils. Wetlands are considered among the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal species. Methods for assessing wetland functions, wetland ecological health, and general wetland condition have been developed for many regions of the world. These methods have contributed to wetland conservation partly by raising public awareness of the functions some wetlands provide. Wetlands occur naturally on every continent. The water in wetlands is either freshwater, brackish or saltwater. The main wetland ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oasis
In ecology, an oasis (; ) is a fertile area of a desert or semi-desert environment'ksar''with its surrounding feeding source, the palm grove, within a relational and circulatory nomadic system.” The location of oases has been of critical importance for trade and transportation routes in desert areas; caravans must travel via oases so that supplies of water and food can be replenished. Thus, political or military control of an oasis has in many cases meant control of trade on a particular route. For example, the oases of Awjila, Ghadames and Kufra, situated in modern-day Libya, have at various times been vital to both north–south and east–west Trans-Saharan trade, trade in the Sahara Desert. The location of oases also informed the Darb El Arba'īn trade route from Sudan to Egypt, as well as the caravan route from the Niger River to Tangier, Morocco. The Silk Road “traced its course from water hole to water hole, relying on oasis communities such as Turpan in China and Sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adrar Plateau
The Adrar (, Berber for "mountain") is a highland natural and historical region of the Sahara Desert in northern Mauritania. The Adrar Region, an administrative division of Mauritania, is named after the traditional region. It is sometimes called Adrar Tamar to distinguish it from other areas called Adrar in the Sahara. Geography The Adrar is an arid plateau, known for its gorges, regs (stony deserts) and sand dunes. Structurally the Adrar is a low central massif which rises to over above sea level just east of Atar near the Amojjar Pass on the track to Chinguetti, then loses elevation and becomes subsumed by dunes to the south and east. Limited cultivation is only possible in the gorges at lower elevations such like oued Seguellil where the water table is high enough to support large palm groves. Notable features include the Oued el Abiod or 'White Valley', a dune-filled fault line along which many small settlements and palm groves are found. The Guelb Aouelloul crater i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Formation
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between latitudes 35°N and 35°S, glaciers occur only in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara Desert
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Late Ordovician
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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