Geomorphic Process:
What it means:
- Endogenetic/Endogenic Process :
The English word 'Endogenetic' comes from a Greek word 'Endon' means interior or inner and 'Genesis' means origin.
- Definition These forces are coming from the interior of the earth, can work suddenly or slowly and produces movement of earth's crust that causes upliftment and subsidence of land called endogenetic process.
- Characteristics:
1. The agents of this process are volcanic activity, Earthquakes etc.
2. It produces 1st order and 2nd order landforms.
3. Landforms changes are seen locally or regionally.
4. They are acting through processes like Plate tectonic, upliftment current of magma, isostasy, stress and strain on crust, horizontal and vertical movement of landforms.
5. It is a landforms constructive process.
- Exogenous Process:
The English word Exogenous comes from the Greek word 'Exo' means External and 'Genesis' means Origin.
In this process landforms on the earth, the surface is shaping and reshaping due to acts of external force.
- Definition: When landforms changes occur by the physical and chemical process of static external forces like sunrays, temperature, wind pressure, humidity, cloud covers, rainfall etc. and dynamic external forces like river, wind, glacier, waves, etc. altogether called exogenous process.
- Characteristics:
1. This process can act all over the world.
2. It is a very slow process. (exception-Subsidence in mass wasting)
3. It produces 2nd and 3rd order landforms.
4. They act through processes like weathering, erosion, mass wasting, denudation etc. those graded the landforms.
5. It is a landform changing process. It wears down high land and deposits eroded materials on the low lands,
6. It can transform land with aggradation and degradation into small scale landforms.
- Difference between Exogenous and Endogenous or Endogenetic processes:
Subject |
Exogenous process |
Endogenic/ Endogenetic
process |
Nature |
This process can construct new landforms |
This process can transform the land
into a small dimension |
Source of power |
Landforms generally originate due to the
convective current of hot magma in the asthenosphere and chemical
reactions |
Landforms
transform due to the
act of climatic elements like river, glacier, sea waves,
groundwater erosional works |
Work of influence |
This process can influence the landforms
locally or regionally |
This process can influence all over the
world |
Speed and Time |
It is a slow or sudden process |
It is a very slow process |
Process through |
Volcanism, Earthquake, Isostasy, Orogenic and
Epeirogenic movements |
Aggradation, Degradation, Biotic process
are categorized |
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