Question

III. Discuss the formation of the following:
1. V-shaped valley
2. Meanders
3. Deflation hollows
4. Sand dunes
5. Barchans​

Answer 1

Answer:

1)A V-valley is formed by erosion from a river or stream over time. It is called a V-valley as the shape of the valley is the same as the letter “V”.

2)The formation of meanders is due to both deposition and erosion and meanders gradually migrate downstream. 

3)deflation hollow Enclosed depression produced by wind erosion. 

4)A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. 

5)A barchan dune can form when a lot of sand is present in the desert. A steady wind from one direction is needed. The face of a barchan is very steep.