aeolian landform /geological action of wind

1. DR.HARISINGH GOUR
VISHWAVIDYALAYA
SAGAR,MP
(A CENTRAL UNIVERSITY)
SEMINARON :-
GEOLOGICAL ACTION OF WIND
GUIDED BY :-
PROF.P.K KATHAL SIR
PRESENTED BY:-
SMRUTIRANJAN SAHOO
M.TECH 1ST SEMESTER
REG NO:-Y18251026
SERIAL NO:-22

2. CONTENTS
Introduction
Types of wind erosion
Erosional landforms
Transportation
Depositional landforms
Conclusion
Bibliography

3. INTRODUCTION:-
Earth a dynamic evolving system.many geological processes are active on the surface
of the surface of the earth.They are called exogenous process.
The notable surface geological processes are weathering , mass wasting , erosion,
transportation and deposition
These processes are capable of creating both constructional and destructional
landforms.If any of the these earths processes are done by a natural system on
the earth,then it is called as a geological agent

4. What is desert ?
A desert is an area with less than 25cm of annual rainfall .
There are 3 types of desert as follows :
Polar Desert
Middle latitude desert
Low latitude desert

6. WIND ACTION CAN BE DIVIDED INTO THREE
PARTS:-
• Erosion
• Transportation
• Deposition

7. Types of erosion:-
• Deflation :- Removal of loose particles by the action of wind.
• Abrasion :- Particles carried by wind here acts as tools of destruction.
• Attrition :- Here mechanical wearing tearing of particles during the
transportation takes place.

8. Erosional Landform - Deflation Hollow

9. Note desert varnish, lack of sand, Iron and
Manganese oxides over everything
Infiltration is slow – Flash Floods, and most water
leaves the area
Desert Pavements or Reg

10. Factors affecting “abrasion”:-
• The strength of wind
• Hardness of blowing sand grains
• Persistence of wind
• Resistance of rock being abraded
Features produced by “abrasion”:-
• Ventifacts
• Yardangs
• Pedestal rocks
• Wind window

11. Pedestal rock :-
• Slender rock column having hard rock at the top and soft
narrow rock at the bottom.

12. Abrasion Origin of Ventifacts

13. Erosional Landforms - Ventifacts
Wind eroded (sand blasted) surfaces

14. Yardangs :-
• Grooved and furrow shaped land forms produced by wind
abrasion.

15. WIND WINDOW AND WIND BRIDGE:-

17. Wind-Borne Sediment causes
deflation and abrasion

27. BARCHANS:-
Migrating crescent dune with horns pointing downward;from
wherestrong winds blow in a consistent direction .Move fastcommon in
central asia and sahara can reach hundreds of feet in height

32. Significance
• It helps in the study of Paleo-environment and Paleo-climatic study
• Sand dunes represents direction of wind flow
• Global climatic changes can also be interpret

34. REFERENCES:-
• Principle of physical Geology by AURTHUR HOLMES.
• Principle of Geomorphology by WILLIAM D. THORNBURY
• Introduction to physical Geology by A. K. DATTA
• Discovering physical Geography by ALAN
• Theory and problems of introductory Geology by RICHARD W OJAKANGAS
WEBSITES:-
• Wikipedia.org/wiki/Aeolian processes
• u/weppdocs/overview/wndersn.html
• www.physicalgeography.net/fundamentals/10ah.html

35. THANK YOU