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Voir la version complète : Madagascar major physical features?


SEXE17
14/12/2008, 21h36
Please help,<br>
i've been searchin for hours loooking for major moutnain ranges, plateais, deserts, and other features! <br>
But i cant find any sites or anything! If you have any sites that would be great!!Madagascar can be divided into five geographical regions: the east coast, the Tsaratanana Massif, the central highlands, the west coast, and the southwest. The highest elevations parallel the east coast, whereas the land slopes more gradually to the west coast. <br>
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The east coast consists of a narrow band of lowlands, about fifty kilometers wide, formed from the sedimentation of alluvial soils, and an intermediate zone, composed of steep bluffs alternating with ravines bordering an escarpment of about 500 meters in elevation, which gives access to the central highlands. The coastal region extends roughly from north of Baie d'Antongil, the most prominent feature on the east coast of the island formed by the Masoala Peninsula, to the far south of the island. The coastline is straight, with the exception of the bay, offering less in the way of natural harbors than the west coast. The Canal des Pangalanes (Lakandranon' Ampalangalana), an 800-kilometerlong lagoon formed naturally by the washing of sand up on the island by the Indian Ocean currents and by the silting of rivers, is a feature of the coast; it has been used both as a means of transportation up and down the coast and as a fishing area. The beach slopes steeply into deep water. The east coast is considered dangerous for swimmers and sailors because of the large number of sharks that frequent the shoreline. <br>
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<a href="http://www.country-studies.com/madagascar/geography.html" rel="nofollow">http://www.country-studies.com/madagasca...</a><br>
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Madagascar rivers<br>
Major Rivers: On the east coast, rivers are short and run swifty because the slope of the land is steep. Major west coast rivers include: the Mananara and Mangoro rivers (which flow from the central highlands to the east coast into the Indian Ocean) and the Maningory River (which flows from the Lake Alaotra to the east coast and the ocean). <br>
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On the west coast, the rivers are longer and run more slowly because the slope of the land is less steep. Major west coast rivers include: the Betsiboka (the longest river of Madagascar - the port of Mahajanga is located at the mouth of this river), the Sambirano, the Mahajamba, the Mania, the North and South Mahavavy, the Mangoky, and the Onilahy. In the south, there is the often-dry Mandrare River. <br>
<a href="http://www.enchantedlearning.com/africa/madagascar/" rel="nofollow">http://www.enchantedlearning.com/africa/...</a><br>
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Major Lakes: The biggest lake in Madagascar is Lake Alaotra; it is approximately 40 km long. <br>
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Highest Point: The highest point in Madagascar is Maromokotro, which is 2,876 m above sea level. <br>
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Lowest Point: The lowest points in Madagascar are at sea level. <br>
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Surrounding Body of Water: Indian Ocean. <br>
<a href="http://www.enchantedlearning.com/africa/madagascar/" rel="nofollow">http://www.enchantedlearning.com/africa/...</a><br>
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moutnain ranges Tsaratanana mountain range<br>
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Three of the four most important montane areas represented in this ecoregion are included in protected areas: Tsaratanana, Andringitra and Marojejy, which comprise 171 km2. Further, as mentioned earlier, there are also small areas of montane habitat protected in the Anjanaharibe-Sud and Andohahela reserves. The Andringitra and Marojejy massifs have the best-preserved montane habitats. Ankaratra has only very small areas of native forest and no formal protection. The Manjakatompo Forest Station in the Ankaratra Massif includes 6.5 km2 of native forest, but this area has no management plan. A priority setting workshop held in 1995 identified the protection of high altitude ecosystems as essential to preserve unknown ecosystems and to protect water quality. The workshop also recognized the Ankaratra region as an area of high biodiversity importance (Ganzhorn et al. 1997).<br>
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The high elevation patches that make up this ecoregion are naturally fragmented due to the dispersed location of the mountain ranges throughout Madagascar. Recent studies of the vicariant distribution patterns of several montane amphibians and reptiles suggest that there was a period in Madagascar?s recent geological history during cool and dry glacial periods when there was a continuous belt of montane habitats between the Andringitra and Ankaratra massifs (e.g. Raxworthy and Nussbaum 1996).<br>
<a href="http://worldwildlife.org/wildworld/profiles/terrestrial/at/at1011_full.html" rel="nofollow">http://worldwildlife.org/wildworld/profi...</a><br>
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GOOD LUCK