Which one of the following is NOT a coastal depositional feature ?
- A.Tombolo
- B.Sand bar
- C.Stack
- D.Spit
Correct answer
Explanation
The correct answer is C, Stack. A stack is a landform made by erosion, not by deposition. Waves attack a headland and open cracks into caves; when caves on both sides meet, a sea arch forms, and when the roof of the arch collapses, the seaward part is left standing as an isolated rock pillar called a stack. Further erosion wears it down to a stump. Depositional features, by contrast, are built where waves and currents drop sand and shingle. Option A is wrong because a tombolo is a bar of sand or shingle that joins an island to the mainland, so it is depositional. Option B is wrong because a sand bar is a ridge of sand laid down offshore or across the mouth of a bay, again by deposition. Option D is wrong because a spit is a ridge of sand attached to the land at one end and extending into the sea, built by longshore drift. Exam tip: erosional coast = cliff, cave, arch, stack, stump; depositional coast = beach, bar, spit, tombolo, lagoon.
Practice Questions
View allInceptisols, Entisols, Vertisols and Mollisols are orders of which one of the following ?
- A.Sugarcane
- B.Soil
- C.Coal
- D.Copper
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These are four of the twelve soil orders in the USDA Soil Taxonomy, the classification also used by Indian soil scientists.
Read the full explanation →Arrange the following major elements present in the Earth's crust, in ascending order, in weight percentage :
1. Aluminium
2. Calcium
3. Silicon
4. Oxygen
Select the answer using the code given below :
- A.3, 4, 1, 2
- B.4, 3, 1, 2
- C.2, 1, 3, 4
- D.1, 2, 3, 4
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By weight, calcium is the smallest of the four and oxygen the largest, so the ascending order is calcium, aluminium, silicon, oxygen.
Read the full explanation →Which town stands on the water divide between the Indus and the Ganga river systems?
- A.Ambala
- B.Dehradun
- C.Haridwar
- D.Agra
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The divide between the two great northern systems does not run along a mountain here but across the almost flat plain of Haryana, and Ambala sits on it, so water falling a little to its west goes to the Ghaggar and the Indus side while water falling to its east…
Read the full explanation →The Tapi river originates near which place in Madhya Pradesh?
- A.Multai in Betul district
- B.Amarkantak in Anuppur district
- C.Janapav in Indore district
- D.Sihawa in Dhamtari district
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It is the second of the two large west flowing peninsular rivers and runs almost parallel to the Narmada, with the Satpura range between them.
Read the full explanation →The Narmada river rises from which of the following?
- A.Amarkantak plateau in Madhya Pradesh
- B.Trimbakeshwar in Maharashtra
- C.Mahabaleshwar in Maharashtra
- D.Brahmagiri range in Karnataka
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The correct answer is A, the Amarkantak plateau in Madhya Pradesh, where the Narmada rises at about one thousand metres and begins its westward journey of some thirteen hundred kilometres through Madhya Pradesh and Gujarat to the Gulf of Khambhat; on the way it makes the Dhuandhar falls and the…
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