'Pingos' are associated with which one of the following process?
- A.Glacial
- B.Peri-glacial
- C.Aeolian
- D.Fluvial
Correct answer
Explanation
The correct answer is B, Peri-glacial. A pingo is a dome-shaped hill with a core of ice, found in regions of permafrost such as the Arctic tundra of Canada, Alaska and Siberia. It forms when groundwater is pushed upward and freezes beneath the surface, and the growing ice lens lifts the overlying soil into a mound that can reach tens of metres in height. Such landforms belong to periglacial processes, which act in cold areas at the edges of ice sheets where the ground freezes and thaws but is not covered by glaciers. The word pingo comes from the Inuit language. Option A is wrong because glacial processes, done by moving ice, create cirques, moraines and drumlins. Option C is wrong because aeolian (wind) processes create sand dunes, yardangs and loess. Option D is wrong because fluvial (river) processes create meanders, oxbow lakes and deltas. Exam tip: pingo and patterned ground, periglacial; drumlin and esker, glacial; barchan, aeolian.
Practice Questions
View allWhich one of the following is a west-flowing river?
- A.Mahanadi
- B.Godavari
- C.Krishna
- D.Narmada
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The Narmada flows west through a rift valley and falls into the Arabian Sea. The Narmada rises at Amarkantak in Madhya Pradesh and flows west for about 1,300 km between the Vindhya and Satpura ranges, along a rift valley formed by faulting.
Read the full explanation →The major part of Central Asia is dominated by which one of the following language families?
- A.Indo-European
- B.Sino-Tibetan
- C.Austric
- D.Altaic
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Read the full explanation →Which of the following pairs of Isolines and its properties are correctly matched ? 1. Isonif : Snowfall 2. Isohel : Sunshine 3. Isohaline : Salinity 4. Isohypse : Cloudiness Select the correct answer using the code given below :
- A.1, 2 and 3
- B.2, 3 and 4
- C.1 and 3 only
- D.1, 2 and 4
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Isonif, isohel and isohaline are matched correctly; an isohypse joins places of equal height, not equal cloudiness. An isoline joins points on a map that have the same value of something.
Read the full explanation →On which among the following is National Waterway No. 2 situated?
- A.The Ganga, Haldia-Prayagraj
- B.West Coast Canal, Kottapuram-Kollam
- C.The Brahmaputra, Sadiya-Dhubri
- D.Godavari and Krishna, Kakinada-Puducherry
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Read the full explanation →Which among the following tribes inhabit the Andaman and Nicobar Islands ? 1. Onge 2. Jarawas 3. Sentinelese Select the answer using the codes given below :
- A.1 and 2 only
- B.2 and 3 only
- C.1, 2 and 3
- D.1 and 3 only
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