THE PROCESS OF GRADATION
The process in which two opposite forces- tectonic or internal forces and erosive or external forces-tend to bring the surface of the lithosphere to a common level. Gradation is achieved by simultaneous processes of degradation and aggradations.
Degradation or Denudation:
The general wearing away of the land surface by external agencies or forces is known as denudation or degradation. It includes the result of weathering, erosion and transportation.
Aggradation or deposition:-
It means the filling up of the depressions on the earth’s surface. The agents of aggradation are the same as those of erosion.
WEATHERING
Weathering is disintegration and decomposition of rocks while erosion is the process or removal, transportation and deposition of the weathered particles. These two processes together are known as ‘Denudation’. Weathering process brings mechanical disintegration and chemical decaying of rocks. Weather conditions are the most decisive phenomenon so the process is commonly known as weathering. However, the type and rate of weathering are also influenced y rock structure, topography and vegetation. Weathering is a static process. It is also the process of soil genesis. It is of three types:
When a region undergoes mechanical weathering, rocks are broken into small pieces. This mechanical disintegration takes place in different ways.
EFFECTS OF CLIMATE ON WEATHERING
Mass Wasting
Mass wasting is the movement of rock materials under the influence of gravity.
These factors include:
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1. What are exogenetic forces in physical geography? |
2. How do exogenetic forces impact the Earth's surface? |
3. What are the primary agents of exogenetic forces? |
4. What is the difference between weathering and erosion? |
5. How do exogenetic forces contribute to the formation of landforms? |
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