While the planet is covered primarily with water, the three major types of landforms are mountains, plains and plateaus. These can be formed by a variety of natural forces, including erosion from water and wind, plate movement, folding and faulting, and volcanic activity.
Check our homepage for new, visually rich, fast and immersive experiences! Being well-versed with the basic features of various landforms and their formation process will be more than enough. ScienceStruck Staff Last Updated: Mar 28, Landforms are defined as the natural physical features found on the surface of the earth.
They are created by the actions of various forces of nature, mainly wind, water, and ice. In most of the cases, it is the erosional and depositional activity carried out by these forces of nature agents of erosion and deposition that leads to the formation of different landforms.
Some landforms are created in a matter of few hours, while others take millions of years to appear. Each of these is characterized by its slope, elevation, soil and rock type, stratification, and orientation.
Aeolian Landforms Aeolian landforms are formed by the chemical and mechanical action of the wind. The areas where wind is the dominant energy are prone to exhibit features such as dunes, loess, and mushroom rocks. Following are some of the many landforms associated with this type.
Dunes Dunes the most common and intriguing features of desert environment and aeolian landforms e. They are mounds or small hills made up of sand, which are created due to the action of wind or aeolian processes and water flow under water dunes. They may be dome-shaped, crescent-shaped, star-shaped, linear-shaped, parabolic also called blowout dunestransverse dunes and many more.
Also, the height of a dune hill can be as low as 1 meter, or as high as 10 meter and more. Barchan is the most common type of dune found on earth. It is crescent in shape and is formed in the direction opposite that of the wind.
Loess Basically, loess is a deposition of silt with a little amount of sand and clay. It appears yellowish or brownish in color and its thickness varies from few centimeters to about meters.
In some places, wind action contributes to the formation of loess e. Trade wind loess in Brazil and Venezuelain some places, glacial activities contribute to the same e.
Sometimes, loess also includes quartz along with other organic materials. Owing to its rich and fertile soils, loess forms an excellent agricultural piece of land.
A mushroom rock can also result from glacial action or an earthquake where an altogether different rock gets placed over a stationary one giving it a mushroom-like appearance. Given the wide aspect and source of their formation, these landforms can be, at times, categorized under other types too.
The prominent features include mesa, butte and canyons. Mesas are also known as table mountains, owing to their distinctive appearances. These are elevated lands like mountains, characterized by presence of a flat top and steep rocks on the sides and can be mistaken for a plateau.
Mesas are frequently noticed in areas that show arid to semi-arid climatic conditions. Occurrences of mesas are observed on Mars as well. Usually mesas are surrounded or covered by a resistant rock often known as a cap rock.
This cap rock is often sedimentary in nature, but can also be igneous in some cases. A solid example of a mesa is the Grand Mesa in western Colorado. Erosion and weathering of the existing layered rocks leads to the formation of table mountains or mesas.
Buttes People often get confused between a butte and a mesa.Landforms are categorised by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure, and soil type.
Earth’s topography is made up of many different types of landforms. While the planet is covered primarily with water, the three major types of landforms are mountains, plains and plateaus. These can be formed by a variety of natural forces, including erosion from water and wind, plate movement, folding and faulting.
“Different coastal landforms are a result of different factors.” Discuss with reference to different types of coastal landforms and the factors which influence them.
2. “Humans have a significant impact on the coastal environment.” Discuss this statement with references to both positive and negative impacts on the coastal zone. Coastal landforms created by erosion include headlands, bays and cliffs.
Landforms created by deposition include spits, salt marshes and beaches. Landforms of deposition. Coastal landforms of deposition occur where the accumulation of sand and shingle is greater than it is removed.
This is particularly the case where constructive waves are prevalent or where there is an abundant amount of beach material supplied. Coastal plains rise from the seal level up to the point they meet raised landforms such as plateaus or mountains.
The Atlantic Coastal plain is a prime example of a substantially populated and fertile coastal plain.