Which one of the following is not an erosional landform?

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Esker

Pediment

Point bar

Stack

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Answer is Wrong!

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UPSC CBI DSP LDCE – 2023

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The correct option is C.

– Esker: A long, winding ridge composed of stratified sand and gravel, deposited by glacial meltwater streams flowing in tunnels within or under a glacier. This is a **depositional** landform.
– Pediment: A broad, gently sloping erosional surface cut into bedrock or thin veneer of alluvium at the foot of a mountain front in arid or semi-arid regions. This is primarily an **erosional** landform.
– Point bar: An alluvial deposit that accumulates on the inside bend of a meandering stream or river. This is a **depositional** landform.
– Stack: A geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coastline, formed by wave erosion. This is an **erosional** landform.

The question asks which one is *not* an erosional landform. Both Esker and Point bar are depositional landforms and therefore fit this description. Given that only one option can be selected, there might be an issue with the question having two correct answers among the options provided (A and C). However, following standard classifications, both are definitively non-erosional (i.e., depositional). If forced to choose one, or assuming a single correct answer is expected, both A and C represent landforms primarily built by deposition of sediment rather than sculpted by erosion. Without further context or clarification, both A and C are technically correct. Based on a common understanding and prominent examples, both Esker (glacial deposition) and Point Bar (fluvial deposition) are key depositional features.

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