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
LIST I | LIST II |
(a) Loess | (i) river deposit |
(b) Moraines | (ii) glacial deposit |
(c) Gravels | (iii) wind deposit |
(d) Silt | (iv) marine deposit |
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
Nazca Plate lies
West of South America
East of South America
East of North America
West of North America
A.
West of South America