This document discusses weathering, which is the process of decay and disintegration of rocks due to physical and chemical agents in the atmosphere like wind, water, ice and sun. It defines various terminology related to weathering like disintegration, deposition, decomposition, erosion and deflation. The types of weathering are mechanical, chemical and biological. Mechanical weathering breaks rocks into pieces through forces like wind, rivers, glaciers etc without chemical change. Chemical weathering breaks rocks through chemical processes like oxidation and carbonation. Biological weathering occurs through processes involving trees, plants, animals and human activity. Factors like the rock type, climate, topography and burrowing organisms affect the rate of weathering. Weathering produces el

1. Weathering
Process of Decay & Disintegration of rocks under the influence
of certain physical & chemical agencies of atmosphere like
wind, water, ice, sun etc.

2. Weathering
Terminology
1) Disintegration
The Process by which the rock is broken into small piece by
mechanical action of the physical agents without chemical
change.

3. Weathering
Terminology
2) Deposition
Process by which the
transported broken
pieces of rocks are
deposited at other
place with or without
chemical change.

4. Weathering
Terminology
3) Decomposition
Process by which rocks
are broken into small
pieces by destructive
chemical action of the
physical agents is called
decomposition.

5. Weathering
Terminology
4) Erosion
Process which includes
destruction of existing
rocks and removal of
product from site of
destruction.

6. Weathering
Terminology
5) Deflation
Process by which rock
particles are removed
by impact of strong
wind.

7. Weathering
Types of Weathering
1) Mechanical Weathering
2) Chemical Weathering
3) Biological Weathering

8. Weathering
Mechanical Weathering
•Wind

9. Weathering
Mechanical Weathering
•River

10. Weathering
Mechanical Weathering
•Glaciers

11. Weathering
Mechanical Weathering
•Tides of Sea

12. Weathering
Mechanical Weathering
•Gravity

13. Weathering
Mechanical Weathering
•Wedging Action of Ice

14. Weathering
Chemical Weathering
•Oxidation

15. Weathering
Chemical Weathering
•Carbonation

16. Weathering
Chemical Weathering
•Hydration

17. Weathering
Biological Weathering
•Trees & Plants

18. Weathering
Biological Weathering
•Manmade
•During Construction of Tunnels & Mining

19. Weathering
Biological Weathering
•Animals
•Some Animals make burrows
underground & help in
weathering of rocks.

20. Weathering
Factors Affecting Weathering
1) Nature of Rock (e.g. Granite & Sandstone)
2) Climate (Climatic Conditions)
3) Physical Environment (Topography)
4) Animals (Burrowing Organisms)

21. Weathering
Products of Weathering
1) Eluvium
End Product of Weathering
that happens to lie over and
above the parental rocks.

22. Weathering
Products of Weathering
2) Deluvium
End Product of weathering
that has been moved to
some distance after its
formation due to
weathering process.

23. Weathering
Soil Profile
If we examine a wall of Trench,
they contains series of layers
called horizons. All horizons
together forms a soil profile.

24. Weathering
Soil Profile
1) Horizon – A
Made up of completely
weathered soil that may
supporting a vegetable
cover.

25. Weathering
Soil Profile
2) Horizon – B
Zone of mixed composition,
partly soil and weathered
rock.

26. Weathering
Soil Profile
3) Horizon – C
Zone of partly soil and
enough weathered rock.

27. Weathering
Soil Profile
3) Horizon – D
It mainly consists of parent
rock material.

28. Weathering
Importance of Weathering
1) Weathered Soil is fertile for agriculture
2) Weathering makes rocks porous and permeable, which is
important for ground water occurrence
3) Develops cheap building Stones
4) Economic minerals deposits like bauxites formed due to
weathering