Earth's Movement
Earth's Movement - These are the physical stress and chemical actions which are continuously acting on the surface of the Earth, bring about a continuous changes in the configuration of the surface of the Earth which are known are geomorphic processes.
Geomorphic processes involve endogenic and exogenic movements.
Exogenic Movement - These are the movements originated due to the forces from outside the Earth's surface.
They give rise to erosion, weathering and smoothening of different relief features.
They produce minor topographical features such as Vallies, waterfalls, caves, etc.
The source of energy in case of exogenic movement is Sunlight and Gravity.
The different agents of exogenic movement are wind, water, glacier, etc.
Endogenic Movement - These are the movements originated from the Earth's interior and they give rise to land upliftment, subsidence, folding, faulting, etc.
The source of energy for endogenic movement is Primordial heat (primitive heat existing since the origin of the Earth) and Radioactivity.
They are responsible for major structural units of Earth's surface.
Difference between Exogenic and Endogenic movement -
Endogenic movement -
- Origin - inside the Earth
- Source - Primordial heat & Radioactivity
- Responsible for major topographical features like plateaus, plains, mountains, etc
Exogenic movement -
- Origin - outside the Earth
- Source - Sunlight & Gravitational force
- Responsible for minor topographical features; modify the existing features (through weathering, erosion, etc)
Together they results in geomorphic processes which are known as Earth's movement.
Terminology -
- Diastrophic movement - very-very slow & continuous movement, can't be observed, results in the formation of primary land forms like mountains, plateaus, etc
- Tectonic movement - results in the building of new landforms
- Epeirogenic movement - results in building of continents due to radial forces
- Orogenic movement - results in building of mountains due to tangential forces
- Aggradation - accumulation of material which results in increase in elevation
- Degradation - breaking down of material which results in decrease in elevation
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Note - This is my Vision IAS Notes (Vision IAS Class Notes) and Ashutosh Pandey Sir's Public Administration Class notes. I've also added some of the information on my own.
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