Tuesday 29 October 2019

landforms made by wind

Land Forms Made By Winds 
                                   moving air is called wind.
   
>   wind also shaped many landforms ...

 >              Basically 2 types 

                           1 erosional  landforms 

                           2 depositional  landforms 


>  Now we discuss different landforms made by winds 


    
1 Ventifacts 
                        The relative significance of each of these processes appears to be a function of the properties of surface materials and the availability of abrasive particles. The landforms that result from aeolian erosion include ventifacts, ridge and swale systems, yardangs, desert depressions, and inverted relief.

                         Image result for landforms ,made by winds ventifacts


2. Yardang  
                      
                    
A yardang is a streamlined protuberance carved from bedrock or any consolidated or semiconsolidated material by the dual action of wind abrasion by dust and sand, and deflation which is the removal of loose material by wind turbulence.
                               




Image result for Yardang




3.Mushroom table 
                                
                                                                
In deserts, a greater amount of sand and rock particles are transported close to the ground by the winds which cause more bottom erosion in overlying rocks than the top. This result in the formation of rock pillars shaped like a mushroom with narrow pillars with broad top surfaces.


                                 
                   Related image



  These are erosional landforms made by wind action now Depositional landforms 
             major depositional landform are Dunes  & there are different types of dunes ..

       Dunes 
                     
                      In physical geography, a dune is a hill of loose sand built by aeolian processes or the flow of water. Dunes occur in different shapes and sizes, formed by interaction with the flow of air or water. 

                      
Image result for dunes
                                
 .> There are different types of dunes : 

                   1 Barchan dunes 
                    2 coastal dunes 
                    3 star dunes 
                    4 dome 
                    5 reverse dunes 
                    6 longitudnal dunes 
                    7 transverse dunes 
   


                   

Image result for dunes types






Image result for dunes types



                               this  is about landforms made by wind. 

         




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