Geography
Name the landform that is formed as a result of the action of wind wherein loose materials are lifted and blown off to be deposited outside the desert margins.
- Sand Dunes
- Barchans
- Deflation Hallows
- Seifs
Related Questions
How do migratory dunes damage towns and villages?
- They cover all surfaces with thick layers of sand.
- The large mass of sand shifts further.
- They can be checked by building walls.
- All of the above.
Assertion (A): Barchan are moon-shaped live dunes.
Reason (R): The migration of the barchans is a threat to desert life.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
See the below figure of a barchan and identify the direction of the wind.
- A
- B
- Both A and B
- Neither A nor B.
Complete the following table:
Stages Effect on the river Work of the river Effect on land Young Stage
(Upper Course)Formation of gorge, rapids and waterfalls. Mainly erosion. Formation of V-shaped valleys. Maturity Stage
(Middle Course)…………… …………… …………… Old Stage
(Lower Course)…………… …………… ……………