8.What are the different types of land forms? Explain them?
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A landform is a feature on the Earth's surface that is part of the terrain. Mountains, hills, plateaus, and plains are the four major types of landforms. Minor landforms include buttes, canyons, valleys, and basins. Tectonic plate movement under the Earth can create landforms by pushing up mountains and hills.Aug
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Many different types of landforms make up Earth’s topography. Several major categories of landform define that smaller portion of the planet not covered by water, including mountains, plains, plateaus and valleys. These can be formed by a variety of natural forces, including erosion from water and wind, plate movement, folding and faulting, and volcanic activity...
(I) The Mountain landforms
The most common type of mountains arise where the Earth’s crust experienced folding or faulting, such as the Canadian Rockies and the Alps. Fault-block mountains, such as California’s Sierra Nevada, are formed when Earth’s crust cracked and was pushed upward. Volcanic mountains form when hot magma from deep in Earth’s interior breaks through the crust and builds up on the surface, whether quietly or explosively. Volcanism can form islands, such as Hawaii, built on a series of broad basaltic shield volcanoes. Volcanoes on continents can also appear isolated and almost island-like given their prominence, a prime example being Washington State’s Mount Rainier.
The most common type of mountains arise where the Earth’s crust experienced folding or faulting, such as the Canadian Rockies and the Alps. Fault-block mountains, such as California’s Sierra Nevada, are formed when Earth’s crust cracked and was pushed upward. Volcanic mountains form when hot magma from deep in Earth’s interior breaks through the crust and builds up on the surface, whether quietly or explosively. Volcanism can form islands, such as Hawaii, built on a series of broad basaltic shield volcanoes. Volcanoes on continents can also appear isolated and almost island-like given their prominence, a prime example being Washington State’s Mount Rainier.The Flats: Plains
The Badlands of North Dakota.
The Badlands of North Dakota.Most of the Earth's surface consists of low and high plains, defined by a mostly level profile that ranges from gently rolling to completely flat. Such landforms are common in areas of extensive sediment accumulation, as in the “floodplains” and deltas of large rivers and the Atlantic-Gulf Coastal Plain of the United States. While those examples are low-lying, higher-elevation plains such as the Great Plains of central North America – built by sediment washed out of the Rocky Mountains and accumulated in long-ago seaways – also exist. Keep in mind that plains describe mostly level topography, though people sometimes incorrectly use “plain” as a synonym for grassland ecosystems (prairies and steppes). You can easily have a forested plain.
The Badlands of North Dakota.Most of the Earth's surface consists of low and high plains, defined by a mostly level profile that ranges from gently rolling to completely flat. Such landforms are common in areas of extensive sediment accumulation, as in the “floodplains” and deltas of large rivers and the Atlantic-Gulf Coastal Plain of the United States. While those examples are low-lying, higher-elevation plains such as the Great Plains of central North America – built by sediment washed out of the Rocky Mountains and accumulated in long-ago seaways – also exist. Keep in mind that plains describe mostly level topography, though people sometimes incorrectly use “plain” as a synonym for grassland ecosystems (prairies and steppes). You can easily have a forested plain.High Expanses: Plateaus
Monument Valley in Utah.
Plateaus can be thought of as elevated plains – that is, elevated flattish areas – bordered on at least one side by lower-lying land and often edged by fairly abrupt scarps. These terrain features may derive from very old mountains eroded down over time, while others form by block-faulting. Earth’s largest plateau is the Tibetan Plateau of Central and East Asia. In arid climates, plateaus can be heavily sculpted by water and wind erosion into mesas, buttes and canyons with extensive bare rock, as in the Colorado Plateau of the American Southwest.
The Landforms of Deserts
The Landforms of DesertsThe ecological landscapes known as deserts, defined by very arid conditions of low precipitation and high evaporation, include plentiful mountains, plains, plateaus and canyons that include distinctive sub-varieties of desert landforms.
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