![]() ![]() Or, it’s a sunken land between two parallel faults. A rift valley is formed when two blocks of earth move apart letting the ‘in between’ block slide downwards.Plate Tectonics – Indian Plate Movement – Comparison: Continental Drift – See Floor Spreading – Plate Tectonics Rift valley lakes They include Lake Titicaca, and the Caspian Sea.Such depressions give rise to lakes of immense sizes and depths.(We have studied all these terms in previous posts) Due to the warping (simple deformation), subsidence (sliding downwards), bending and fracturing (splitting) of the earth’s crust, tectonic depressions occur.Lakes Formed by Earth Movement Tectonic lakes Playas or salt lakes, are a common feature of deserts (recall desert landforms).has a salinity of 220 parts per thousand. For example the Dead Sea has a salinity (salt content) of 250 parts per thousand, and the Great Salt Lake of Utah, U.S.A. ![]() ![]() Examples of salt lakes include Great Salt Lake, the Aral Sea and the Dead Sea.Because of the intense evaporation (negative freshwater balance = more water is lost in evaporation than gained from rivers) these lakes are saline.Salt lakes (also called saline lakes) can form where there is no natural outlet or where the water evaporates rapidly and the drainage surface of the water table has a higher-than-normal salt content.Most of the lakes in the world are fresh-water lakes fed by rivers and with out-flowing streams e.g.Example: Great Lakes of North America, East African Rift Lakes.ĭivergent Boundary – African Rift System Formation Fresh water lakes.These lakes are deep and carry more water than could ever be evaporated.In this kind of lakes, Evaporation In this kind of lakes, Evaporation > Precipitation.Lakes may exist temporarily filling up the small depressions of undulating ground after a heavy shower.Canada, Finland and Siberia contain most of the fresh water lakes. The majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher latitudes.Some lakes do not have a natural outflow and lose water solely by evaporation or underground seepage or both. Other lakes are found in endorheic basins.Most lakes have at least one natural outflow in the form of a river or stream, which maintain a lake’s average level by allowing the drainage of excess water.Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation.Lakes lie on land and are not part of the ocean, and therefore are distinct from lagoons, and are also larger and deeper than ponds.A lake is a body of water of considerable size, localized in a basin, that is surrounded by land apart from a river or other outlet that serves to feed or drain the lake. ![]()
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