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Geography Of Madagascar
Madagascar is a large island in the Indian Ocean located off the eastern coast of Southern Africa, east of Mozambique. It has a total area of with of land and of water. Madagascar is the fourth-largest island in the world. The highest point is Maromokotro, in the Tsaratanana Massif region in the north of the island, at . The Republic of Madagascar is the second-largest island country in the world. Its capital Antananarivo is in the Central Highlands near the centre of the island. It has the 25th largest exclusive economic zone of . Geographical regions Madagascar can be divided into five general geographical regions: the east coast, the Tsaratanana Massif, the Central Highlands, the west coast, and the southwest. The highest elevations parallel the east coast. The total size is , which makes it the world's second largest island country. East coast The east coast consists of a narrow band of lowlands about wide, formed from the sedimentation of alluvial soils, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Africa
Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With nearly billion people as of , it accounts for about of the world's human population. Demographics of Africa, Africa's population is the youngest among all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Based on 2024 projections, Africa's population will exceed 3.8 billion people by 2100. Africa is the least wealthy inhabited continent per capita and second-least wealthy by total wealth, ahead of Oceania. Scholars have attributed this to different factors including Geography of Africa, geography, Climate of Africa, climate, corruption, Scramble for Africa, colonialism, the Cold War, and neocolonialism. Despite this lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentation
Sedimentation is the deposition of sediments. It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism. Settling is the falling of suspended particles through the liquid, whereas sedimentation is the final result of the settling process. In geology, sedimentation is the deposition of sediments which results in the formation of sedimentary rock. The term is broadly applied to the entire range of processes that result in the formation of sedimentary rock, from initial erosion through sediment transport and settling to the lithification of the sediments. However, the strict geological definition of sedimentation is the mechanical deposition of sediment particles from an initial suspension in air or water. Sedimentation may pertain to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pirate
Piracy is an act of robbery or criminal violence by ship or boat-borne attackers upon another ship or a coastal area, typically with the goal of stealing cargo and valuable goods, or taking hostages. Those who conduct acts of piracy are called pirates, and vessels used for piracy are called pirate ships. The earliest documented instances of piracy were in the 14th century BC, when the Sea Peoples, a group of ocean raiders, attacked the ships of the Aegean and Mediterranean civilisations. Narrow channels which funnel shipping into predictable routes have long created opportunities for piracy, as well as for privateering and commerce raiding. Historic examples of such areas include the waters of Gibraltar, the Strait of Malacca, Madagascar, the Gulf of Aden, and the English Channel, whose geographic structures facilitated pirate attacks. The term ''piracy'' generally refers to maritime piracy, although the term has been generalized to refer to acts committed on land, in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mahajanga
Mahajangā (French: Majunga) is a city and an administrative district on the northwest coast of Madagascar. The city of Mahajanga (Mahajanga I) is the capital of the Boeny Region. The district (identical to the city) had a population of 258,068 in 2020. City Mahajanga is a seaport, the second most important one in Madagascar after Toamasina. The marine terminal accommodates containerships and small (150 gross ton) general cargo freighters. Because of the limited water depth at the wharf, only small ships can call at the terminal. Deeper-draft ships anchor off the terminal and transfer cargo to and from barges, which move it to and from the terminal. Severe storms during December 2006 damaged the bulkhead, allowing water to flow in and wash backfill out from under the terminal's paving blocks. The resulting collapse of pavement blocks has made operations at the terminal less efficient and reduced the storage space available. The largest and most valuable containerized expor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsidence
Subsidence is a general term for downward vertical movement of the Earth's surface, which can be caused by both natural processes and human activities. Subsidence involves little or no horizontal movement, which distinguishes it from slope movement. Processes that lead to subsidence include dissolution of underlying carbonate rock by groundwater; gradual compaction of sediments; withdrawal of fluid lava from beneath a solidified crust of rock; mining; pumping of subsurface fluids, such as groundwater or petroleum; or warping of the Earth's crust by tectonic forces. Subsidence resulting from tectonic deformation of the crust is known as tectonic subsidence and can create accommodation for sediments to accumulate and eventually lithify into sedimentary rock. Ground subsidence is of global concern to geologists, geotechnical engineers, surveyors, engineers, urban planners, landowners, and the public in general.National Research Council, 1991. ''Mitigating losses from land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rift Valley
A rift valley is a linear shaped lowland between several highlands or mountain ranges produced by the action of a geologic rift. Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear depression may subsequently be further deepened by the forces of erosion. More generally the valley is likely to be filled with sedimentary deposits derived from the rift flanks and the surrounding areas. In many cases rift lakes are formed. One of the best known examples of this process is the East African Rift. On Earth, rifts can occur at all elevations, from the sea floor to plateaus and mountain ranges in continental crust or in oceanic crust. They are often associated with a number of adjoining subsidiary or co-extensive valleys, which are typically considered part of the principal rift valley geologically. Earth's rift valleys The most extensive rift valley is located along the crest of the mid-ocean ridge system and is the result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Itasy
Lake Itasy also known as Itasianaka is a lake in central Madagascar. It is located in Itasy Region. It is situated in the municipalities of Ampefy, Soavinandriana, Manazary and Analavory. Lake Itasy has an area of 3,500 hectares. It is the fourth largest lake on Madagascar, after lakes Alaotra, Kinkony, and Ihotry.Battistini, R., Richard-Vindard, G. (eds) (1972) ''Biogeography and Ecology in Madagascar''. Monographiae Biologicae, vol 21. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-7159-3_5 The lake has an average depth of 4 meters, and reaches up to 10 meters deep. The water level varies seasonally. There are marshy areas in the southern and eastern parts of the lake.BirdLife International (2023Bird Areas factsheet: Lake Itasy Accessed 16 January 2023. Lake Itasy lies east of the Itasy volcanic field. The volcanic activity in the region is relatively recent, and the lake was formed when lava flows blocked a river, forming a lake behind it. The landscape aroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landscape Madagascar 01
A landscape is the visible features of an area of land, its landforms, and how they integrate with natural or human-made features, often considered in terms of their aesthetic appeal.''New Oxford American Dictionary''. A landscape includes the physical elements of geophysically defined landforms such as mountains, hills, water bodies such as rivers, lakes, ponds and the sea, living elements of land cover including indigenous vegetation, human elements including different forms of land use, buildings, and structures, and transitory elements such as lighting and weather conditions. Combining both their physical origins and the cultural overlay of human presence, often created over millennia, landscapes reflect a living synthesis of people and place that is vital to local and national identity. The character of a landscape helps define the self-image of the people who inhabit it and a sense of place that differentiates one region from other regions. It is the dynamic backdrop to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Wall Climbing
Big wall climbing is a form of rock climbing that takes place on long and sheer multi-pitch climbing, multi-pitch climbing routes, routes (of ''at least'' 6–10 pitches or 300–500 metres) that require a full day, if not several days, to ascend. Big wall routes are sustained and exposed and the climbers remain suspended from the continuously sheer and vertical rock face, even sleeping hanging from the face, with limited options to sit down or escape unless they abseil down the route—a complex and risky action. It is therefore a physically and mentally demanding form of climbing. Big wall climbing is typically done in pairs in a traditional climbing format, but with the distinction that the non-lead climber usually ascends by jumaring up a fixed rope to save time and energy. It requires an extensive range of supplies and equipment over and above that of traditional climbing that is carried in haul bags, including portaledges, aid climbing equipment, poop tubes, and food and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nosy Be
Nosy Be (; formerly Nossi-bé and Nosse Be, ) is a volcanic island off the northwest coast of Madagascar. Nosy Be is Madagascar's largest and busiest tourist destination. It has an area of , and its population was 109,465 according to the provisional results of the 2018 Census. means "big island" in the Malagasy language. The island was called Assada by the French during the early 17th century. Nosy Be has been given several nicknames over the centuries, including "Nosy Manitra" (the scented island). History The first human inhabitants of Nosy Be were small bands from Antankarana and Zafinofotsy ethnic groups, before the Sakalava people migrated there and became the largest group on the island. These people were joined later by some Comorians, Indians and Antandroy. Nosy Be made its first major appearance in Madagascar's history when King Radama I announced that he intended to conquer the whole west of Madagascar. That plan was eventually achieved in 1837 when the Sakalava ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antsiranana
Antsiranana ( ), named Diego-Suarez prior to 1975, is a city in the far north of Madagascar. Antsiranana is the capital of Diana Region. It had an estimated population of 115,015 in 2013. History At the beginning of the 16th century, a Portuguese squadron of 13 ships crisscrossed the Indian Ocean; One of these ships went adrift, and its captain, Diogo Dias, was therefore the first European to discover the island on August 10, 1500, which he named Isle of Saint Lawrence. In February 1506, Admiral Fernão Soares recognized the place and so Antomabokala, former capital of Ankarana, acquired its name of Diego Suarez (Diogo Soares, in Portuguese), which comes from the junction of the first name of the captain and the surname of the Admiral. In 1635, the bay was mentioned for the first time under this name by the French pilot Berthelot, author of an oriental map of Africa and Madagascar. In 1824, the bay was explored by the English hydrographer Owen, then in 1833, Captain Bigeault, com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montagne D'Ambre
Montagne d'Ambre National Park is a national park in the Diana Region of northern Madagascar. The park is known for its endemic flora and fauna, water falls and crater lakes. It is north of the capital, Antananarivo, and is one of the most biologically diverse places in all of Madagascar with seventy-five species of birds, twenty-five species of mammals, and fifty-nine species of reptiles known to inhabit the park. Geography The park covers an area of on an isolated volcanic massif, of mostly basaltic rock, above the surrounding dry region. Attractions include spectacular waterfalls and several crater lakes. There are numerous rivers and streams and the park is a water catchment area for the town of Antsiranana, which is surrounded by dry, sparse forests and semi-desert with succulent plants. Annual rainfall in the park is compared with around the town. The area is named after the deposits of copal, a soft form of amber. Amber is one of the most accessible parks in northern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
