A ramp of sand deposited by streams along foothills in the arid land is called 

• Hamada

• Bajada

• Desert Wash

• Pediment

Arrange the following mountain building theories in order in which they published.

Use the codes given below :

(i) Continental Drift

(ii) Convection Current Theory

(iii) Sea Floor Spreading Theory

(iv) Plate Tectonic Theory

• a-i , b-ii , c-iii , d-iv

• a-ii , b-i , c-iii , d-iv

• a-iv , b-ii , c-i , d-iii

• a-iii , b-i , c-ii , d-iv

ASSERTION (A) : Flowing as a sheet across a land surface , running water picks up particles and moves them downslope into a stream channel.

REASON (R) : Stream flow always transport all kinds of sediment load downstream.

• Both (A) and (R) are true.

• Both (A) and (R) are true , but (R) is not the correct explanation.

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

194.

Flat topped steep sided upland capped by a resistant rock layer normally formed in arid lands is called

• Erg

• Cuesta

• Mesa

• Escorpment

The statement "The present is the key to the past." was given by

• G.K. Gilbert

• James Hutton

• W.H. Davis

• Walter Penck

Which process of chemical weathering causes rusting of iron ?

• Carbonation

• Oxidation

• Hydration

• Dissilication

Sea floor spreading theory was propounded by

• Harry Hess

• Tuzo Wilson

• A.Hobbes

• D.L. Holms

• a-ii , b-i , c-iv , d-iii

• a-iii , b-iv , c-ii , d-i

• a-i , b-ii , c-iii , d-iv

• a-iv , b-iii , c-ii , d-i

ASSERTION (A) : Remains of older mountain belts lie within the shields in few places.

REASON (R) : Older mountain belts in shield areas are composed of soft sedimentary rocks.

• (A) is correct , but (R) is wrong.

• Both (A) and (R) are correct.

• (A) is wrong , but (R) is correct.

• Both (A) and (R) are wrong.

Which of the following area's observation motivated Davis to develop his concept on "Cycle of Erosion" ?

• Missouri

• Montana

• Grinoco

• Red river