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Types of Sand Dunes

In this Geoshortqa we are going to know about types of Sand Dunes. Types of Sand Dunes, Geoshortqa Sand Dunes Sand dunes are heaps of sand found in deserts . Generally , their heights vary from a few metres to 20m , but in some cases dunes are several hundred metres high and 5 to 8 km long .   The formation of sand dunes requires  • Wind of high velocity  • Abundant sand  • Obstacles such as trees , bushes , forests , rock outcrops , walls against , which dunes may settle  • Ideal places i.e. dune complex , dune colony or dune chain . Dunes formed due to obstacles like hushes , walls etc. are called nebkhas , where dune formed besides desert depressions are called lunettes.   Dunes are classified on the basis of morphology , structure , orientation , location , internal structure , ground pattern and number of slip faces . These are the various types of sand dunes  a) Transverse Dunes are dunes deposited transverse to the prevailing winds direct...
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Types of Shock Waves

 

In this Geoshortqa we know about Types of Shock Waves.


Shock waves, Geoshortqa


Types of Shock Waves

(a) Undisturbed materials

 At the vary beginning there was no wave action found and all the materials are undisturbed

Undisturbed materials, Geoshortqa

 There are mainly two types of shock waves are found 

 1) Body Waves

 These travel through the crust and are of two types

 (b) Primary (P) Waves 

which cause the crustal rock to move back and forth in the direction of wave movement.


Primary (P) Waves , Geoshortqa

* click on photo for getting higher resolution


 (c) Secondary (S) Waves

 which cause the crustal rock to move from side to side i.e. at right angles to the direction of wave movement.

Secondary (S) Waves, Geoshortqa

2) Surface Waves

 These travel through the surface rocks and are of two types 

(d) Love (L) Waves

 which cause the surface rocks to more from side to side, at right angles to the direction of wave movements.

Love (L) Waves, Geoshortqa


 (e) Rayleigh (R) Waves

 which cause the surface rocks to have a vertical circular movement very similar to that of water in a sea wave.

Rayleigh (R) Waves, Geoshortqa



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Famous Theory, Model and Concepts related to geomorphology

 In this Geoshortqa we know about some famous Theory,  Model and Concepts related to geomorphology. Famous Theory, Model and Concepts related to geomorphology, geoshortqa Theory, Model and Concepts   Name                                    Proponent ✓ Complete Cycle Of River Life    -   W.M Davis  ✓ Base Level Of Erosion         -          J.W Powell ✓Karst Cycle Of Erosion   -    Beede and Cvijic ✓ Dynamic Equilibrium Theory      -    J.T Hack ✓Cyclic Nature Of Earth History    -   Hutton  ✓Panplanation               -           C.H Crickmay  ✓Episodic Erosion Model      -      S.A Schumm ✓Graded Stream          ...
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Isoline

In this Geoshortqa , we know about isoline or contour line. Isoline, geoshortqa Contour line or Isoline  : Joins points of the same height above ground.
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Isoquant

  In this Geoshortqa we know about Isoquant   Isoquant, Geoshortqa Isoquant  In Microeconomics, is a line joining points at which the equal quantity of output is produced.
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Isohel

  In this Geoshortqa we know about isohel Isohel An imaginary line joining points on a map having the equal amount of sunshine.
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Internal structure of the Earth

In this Geoshortqa we know about the Internal structure of the Earth Internal structure of the Earth, geoshortqa  
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