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RELIEF

TermDefinition
Mountain natural elevations of land that are high. Groups of related mountains form a mountain system. Young mountains are formed recently, they have little erosion; old mountains have more rounded features, due to greater erosion, they are lower.
Valley long depression in the surface of the land. Valleys generally form as a result of the action of water or ice on the ground.
Plateau high areas, above 300 m, with a relatively flat surface. They can have some areas of uneven terrain, resulting from the total erosion of old mountain ranges.
Depression landforms sunken below the surrounding area.
Plain flat land near rivers o coasts, where sedimentary deposits have accumulated in recent times. These deposits come from areas of high relief (mountains or plateaus) and have been carried there by water and in the air.
Peninsula area of land that is almost completely surrounded by sea. It is connected to the coast by just a narrow strip of land. This strip of land is called an isthmus.
Cape large area of land that stretches out into the sea.
Gulf large area of sea between two capes. A similar area on a smaller scale is called a bay.
Continental shelf A gently sloping plain that extends from a continent and which can be up to 200 metres deep. Its width varies, being narrower at the foot of mountains and wider offshore from plains.
Continental slope The steep slope at the end of the continental shelf.
Abyssal plain Underwater plains, found at great depths (4000 or 5000m below the surface). Area of flat seafloor at a depth of -4000m.Most of the ocean floor is of this type.
Oceanic trench very deep parts of the ocean, which can reach depths of over 11,000 m. They are close to continents and correspond to the area where tectonic plates meet in a subduction zone. Found in areas with islands of volcanic origin, (Japan and the Philippines).
Mid-ocean ridge underwater mountain ranges with a height of up to 3000 m, made of volcanic rock. At the points where they are visible above the water, they form islands and archipelagos (Azores or Iceland).
Mountain System group of mountains that are related.
Mountain Range a part of a mountais system (group of mountains). (cordillera)
Hill natural elevation not veri high.
Cliff high, steep area of rock which suddenly meets the sea.
Delta body of sediment deposited at the mouth of a river
Island piece of land surrounded by the sea.
Archipielago group of islands.
Isthmus narrow strip of land that connects a peninsula with the mainland or the continent.
beach flat piece of land located between the land and sea.
 

 



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