The old age of the Aravalli is geographically understood through which feature?
Answer and explanation
Correct answer: Lower height and heavy erosion
The governing concept is the geomorphic effect of long geological age. The Aravalli Range is among the oldest fold mountain systems in India. Over very long periods, weathering, erosion and denudation reduce relief, round the slopes and lower the heights of a mountain range. Consequently, its relatively low and highly eroded form is evidence of ancient age, making option A correct. Permanent snow cover would indicate a very high or cold environment, not simply old age. Recent volcanic activity and marine coral formation describe different geological processes and do not explain the present character of the Aravallis.
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What is the correct answer to this question?
Lower height and heavy erosion
Why is this the correct answer?
The governing concept is the geomorphic effect of long geological age. The Aravalli Range is among the oldest fold mountain systems in India. Over very long periods, weathering, erosion and denudation reduce relief, round the slopes and lower the heights of a mountain range. Consequently, its relatively low and highly eroded form is evidence of ancient age, making option A correct. Permanent snow cover would indicate a very high or cold environment, not simply old age. Recent volcanic activity and marine coral formation describe different geological processes and do not explain the present character of the Aravallis.
Which subject and chapter does this question cover?
This is a Class 10 General Knowledge question. Chapter: Indian Geography. Topic: Mountains and Plateaus of India.
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