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Marrah Mountains
The Marrah Mountains or Marra Mountains (Fur, Fugo Marra; , Jebel Marra) are a range of volcanic peaks in a massif that rises up to . They are the highest mountains in Sudan. Geography The mountains are located in the center of the Darfur region of Sudan on the border of the states of South Darfur and Central Darfur, with a smaller part of the range in the state of North Darfur. The highest point is Deriba Caldera. The upper reaches of the massif is a small area of temperate climate with high rainfall and permanent springs of water amidst the dry savanna and scrub of the Sahel below. Apart from the Aïr Mountains in Niger which are on the border of the Sahara proper, the Marrah Mountains are the only major mountain range in the otherwise flat Sahel, rising up to above the plain, but are relatively unknown owing to lack of development and political conflict in the region. The last eruption occurred around 1500 BC. The centre of activity was Deriba Caldera, and involved calde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudan
Sudan, officially the Republic of the Sudan, is a country in Northeast Africa. It borders the Central African Republic to the southwest, Chad to the west, Libya to the northwest, Egypt to the north, the Red Sea to the east, Eritrea and Ethiopia to the southeast, and South Sudan to the south. Sudan has a population of 50 million people as of 2024 and occupies 1,886,068 square kilometres (728,215 square miles), making it Africa's List of African countries by area, third-largest country by area and the third-largest by area in the Arab League. It was the largest country by area in Africa and the Arab League until the 2011 South Sudanese independence referendum, secession of South Sudan in 2011; since then both titles have been held by Algeria. Sudan's capital and most populous city is Khartoum. The area that is now Sudan witnessed the Khormusan ( 40000–16000 BC), Halfan culture ( 20500–17000 BC), Sebilian ( 13000–10000 BC), Qadan culture ( 15000–5000 BC), the war of Jebel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marrah Mountains Caldera
Marrah may refer to: * Marrah Mountains The Marrah Mountains or Marra Mountains (Fur, Fugo Marra; , Jebel Marra) are a range of volcanic peaks in a massif that rises up to . They are the highest mountains in Sudan. Geography The mountains are located in the center of the Darfur region ..., Sudan * Maraq, Markazi, a village in Iran See also * Marah (other) * Marra (other) {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Sudan ...
This is a list of active and extinct volcanoes in Sudan. References {{Global Volcanism Program Sudan Volcanoes A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Ranges Of Sudan
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 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 and climate, mountains te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdul Wahid Al Nur
Abdul (also transliterated as Abdal, Abdel, Abdil, Abdol, Abdool, or Abdoul; , ) is the most frequent transliteration of the combination of the Arabic word '' Abd'' (, meaning "Servant") and the definite prefix '' al / el'' (, meaning "the"). It is the initial component of many compound names, such as ' (usually spelled ''Abdel Hamid'', ''Abdelhamid'', ''Abd El Hamid'' or ''Abdul Hamid''; lit. "servant of the Praised"), ' ( Abdullah), and ' ( Abdul Malik). The most common use for ''Abdul'' by far, is as part of a male given name, written in English. When written in English, ''Abdul'' is subject to variable spacing, spelling, and hyphenation. It is a common name in the Middle East, North Africa, West Africa, East Africa, Central Asia, the Balkans, the Caucasus, and predominantly Muslim countries of South Asia and Southeast Asia. It is also used amongst African Americans and Turkic peoples of Russia. The meaning of ''Abdul'' literally and normally means "Slave of the", but E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudan Liberation Movement/Army
The Sudan Liberation Movement/Army ( ''Ḥarakat Taḥrīr as-Sūdān''; abbreviated SLM, SLA, or SLM/A) is a Sudanese rebel group active in Darfur, Sudan. It was founded as the Darfur Liberation FrontFlint, Julie and De Waal, Alexander (2008) ''Darfur: A New History of a Long War'' Zed Books, London, p. 90, by members of three indigenous ethnic groups in Darfur: the Fur, the Zaghawa, and the Masalit, among whom were the leaders Abdul Wahid al-Nur of the Fur, Khamis Abakar of the Masalit and Minni Minnawi of the Zaghawa. Formation General Omar al-Bashir and the National Islamic Front headed by Dr. Hassan al-Turabi overthrew the Sudanese government led by Ahmed al-Mirghani in 1989. A large section of the population in Darfur, particularly the non-Arab ethnicities in the region, became increasingly marginalized. These feelings were solidified in 2000 by the publication of '' The Black Book'', which detailed the structural inequity in the Sudan that denies non-Arabs equ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War In Darfur
The War in Darfur, also nicknamed the Land Cruiser War, was a major armed conflict in the Darfur region of Sudan that began in February 2003 when the Sudan Liberation Movement/Army, Sudan Liberation Movement (SLM) and the Justice and Equality Movement (JEM) rebel groups began fighting against the government of Sudan, which they accused of oppressing Darfur's non-Arab population. The government responded to attacks by carrying out a campaign of ethnic cleansing against Darfur's non-Arabs. This resulted in the death of hundreds of thousands of civilians and the indictment of Sudan's president, Omar al-Bashir, for Darfur genocide, genocide, war crimes, and crimes against humanity by the International Criminal Court. One side of the conflict is mainly composed of the Sudanese military, police, and the Janjaweed, a Sudanese militia group whose members are mostly recruited among Arabization, Arabized indigenous Africans and a small number of Bedouin of the northern Rizeigat; the ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerald Ernest Wickens
Gerald Ernest Wickens B.Sc., M.Sc., Ph.D., F.L.S. (18 December 1927 – 11 March 2019) was a British botanist. Biography Gerald Ernest Wickens was born Marylebone in 1927 and attended Ealing County High School. Following army service (1946–1948) he followed a career in agriculture and conservation in Africa. He served in the Africa Agriculture Department from 1952 and joined Hunting Technical Services (1962–1966) in Sudan where he was team leader and ecologist for a study of Jebel Marra, an isolated massif. In 1967 he worked at the Herbarium at Kew Gardens, continuing to work on African plants, especially Combretaceae, Melastomataceae and Crassulaceae. He was awarded a Ph.D. from Reading University in 1972 for his theses "The Flora of Jebel Marra". In 1981 worked on the Survey of Economic Plants for Arid and Semi-Arid Tropics (SEPASAT). From 1983 he headed the Economic and Conservation Section of the Herbarium (ECOS), which included directing the cataloguing of the Economic B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to . The gases and tephra can reach temperatures of about . Pyroclastic flows are the deadliest of all volcanic hazards and are produced as a result of certain explosive eruptions; they normally touch the ground and hurtle downhill or spread laterally under gravity. Their speed depends upon the density of the current, the volcanic output rate, and the gradient of the slope. Origin of term The word ''pyroclast'' is derived from the Greek (''pýr''), meaning "fire", and (''klastós''), meaning "broken in pieces". A name for pyroclastic flows that glow red in the dark is (French, "burning cloud"); this was notably used to describe the disastrous 1902 eruption of Mount Pelée on Martinique, a Frenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumice
Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of extremely vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls, and being dark colored and denser.Jackson, J.A., J. Mehl, and K. Neuendorf (2005) ''Glossary of Geology'' American Geological Institute, Alexandria, Virginia. 800 pp. McPhie, J., M. Doyle, and R. Allen (1993) ''Volcanic Textures A guide to the interpretation of textures in volcanic rocks'' Centre for Ore Deposit and Exploration Studies, University of Tasmania, Hobart, Tasmania..198 pp. Pumice is created when super-heated, highly pressurized rock is rapidly ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aïr Mountains
The Aïr Mountains or Aïr Massif (Air Tamajeq language, Tamajăq: ''Ayǝr''; Hausa language, Hausa: Eastern ''Azbin'', Western ''Abzin'') is a triangular massif, located in northern Niger, within the Sahara. Part of the West Saharan montane xeric woodlands ecoregion, they rise to more than and extend over . Lying in the midst of desert north of the 17th parallel north, 17th parallel, the Aïr plateau, with an average altitude between , forms an island of Sahel climate which supports a wide variety of life, many pastoral and farming communities, and dramatic geological and archaeological sites. There are notable archaeological excavations in the region that illustrate the prehistoric past of this region. The endangered African wild dog (''Lycaon pictus'') once existed in this region, but may now be Local extinction, extirpated due to habitat fragmentation, human population pressures in this region. Geology The Precambrian to Cenozoic Aïr Mountains consist of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
