ASSERTION (A) : The velocity of moving ice increases with steepness of slope of the area and thickness of glacial ice.

REASON (R) : The velocity decreases to the sides owing to lesser depth of ice and friction against the valley walls and the bottom floor.

• Both (A) and (R) are true and (R) is the correct explanation of (A).

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

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

The normal cycle of erosion is associated with

• Marine erosion

• Wind erosion

• River erosion

• Glacial erosion

Which of the following groups of scholars stressed the role of lateral erosion by streams in the formation of pediments ?

• Mc Gee , Paige , Blackwelder

• Mc Gee , Blackwelder , Johnson

• Paige , Blackwelder , Johnson

• Paige , Johnson , Lawson

The most abundant rock type in the earth's crust is 

• Metamorphic

• Secondary rocks

• Igneous

• Sedimentary

Which one of the following is not a topographic evidence of rejuvenation in landscape ?

• Incised meanders

• Structural meanders

• Paired valley meanders

• Multi-cyclic valley

• a-i , b-ii , c-iv , d-iii

• a-iii , b-ii , c-iv , d-i

• a-iv , b-i , c-iii , d-ii

• a-iii , b-iv , c-i , d-ii

Which one of the following characteristics paternoster lakes ?

• A lake of volcanic origin

• A shallow stretch of water separated from the sea

• A cresent shaped lake formed due to cut-off of a river meander

• Lake formed on glacial stairways

Seifs are produced by

• gravity 

• winds

• waves

• stream

The slope declining model was proposed by

• W.Penck

• W.M. Davisq

• L.C.King

• Wood

Nazca Plate lies

• West of South America

• East of South America

• East of North America

• West of North America