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Constructive landforms
What is a Landform
Landforms created by crustal deformationLanforms created from volcanic activityFormation of landforms from sediment depositionWeathering factor of landformsLandforms created by erosionKinds of landformsFormation of a canyon landformformation of cape and formation of peninsulaFormation of coastline landformsFormation of continental shelf landformsFormation of a delta landformFormation of desert landformsFormation of glaciersHow do islands formHow do isthmus landforms formFormation of mountain landformsHow fo plains formHow do Plateaux landform formHow do sand dunes formHow do valleys formDestructive landforms
SUGGESTED LESSONS
Genetic engineering
Green energy
crude oil
Effects of overfishing
Water shortage
climate change
DeforestationThe ozone layer
Waste management
Wasting foodNatural resources for children

How is a landform created


How does erosion shape landforms


Erosion is the natural process of removal and transportation of weathered material from its original location and deposition of it into a new environment. The factors or agents of erosion include water, ice, wind and gravity. Many spectacular waterfalls, caves, coastal platforms, and valleys have been a result of erosion.

Water erosion:
Water erosion can occur anywhere that there is water and land or rock surface. Water erosion can begin as soon as raindrops start falling. As more rain falls, the water runs over the land or rock surface, collecting weathered material with them. The power or moving water increases with more water and its ability to carry heavy debris increases. Vegetation cover and mulch often help obstruct and reduce the impact of water erosion. Water erosion (and river erosion) is more powerful on steep slopes than on gentle or flat ground.

Water erosion can also occur in coastal areas. Powerful waves can push water and pound its surrounding lands, often carving out interesting landforms in them.

Below is an illustration of how sea waves can carve out weak rocks into interesting geological features.


River erosions also have an important role in the formation of landforms. CLICK HERE TO SEE MORE

Wind erosion:

Wind action such as whirlwind and more powerful ones such as hurricanes and tornados can move weathered material. During wind erosion, three things happen: First, they can lift and transport dust, sand and loose rock particles (suspension). Secondly, sand particles can saltate, bounce and jump and break down into even smaller particles. Thirdly, bigger sand particles can be dragged along (creeping). During erosion, the airborne particles can polish any object in its path. (CLICK HERE TO SEE THE PROCESS OF WIND EROSION)

Dunes are very good examples of the action of wind erosion. They are very common in desert areas where there is very little rainfall and vegetation. Rock pedestal (mushroom rock) is another feature from wind erosion. Below is an illustration of how wind erosion carves rock pedestals.

Ice erosion:
Glacier is moving ice. This happens in places where there is more snowfall than snow melts. As snow accumulates, sometimes for many years, they thicken and give way due to gravity. Glaciers can carry various sizes and weight of debris with them.


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Landform diagrams

How is a landform created