Which of the following statements are concerned with eskers and drumlins?
- Eskers are ridges of crudely bedded gravels and sands.
- Drumlins are constituted mostly of boulder and clay.
- Basket of eggs topography is the characteristic of terrains with eskers
- While eskers are built by glacier streams, drumlins result from glacier action.
Choose the correct answer from the options given below.
Detailed Explanation:
Eskers are sinuous ridges formed by glacial meltwater streams, composed of crudely bedded gravels and sands (Statement 1 correct). Drumlins are streamlined hills formed by direct glacial action, consisting mainly of boulder clay/till (Statement 2 correct). Statement 4 correctly distinguishes their formation: eskers by subglacial streams, drumlins by moving ice.
Statement 3 is incorrect: "Basket of eggs topography" characterizes terrain with drumlins, not eskers. Drumlin fields resemble baskets of eggs when viewed from above due to their oval, clustered appearance.
Therefore, statements 1, 2, and 4 are correct, making Option 2 the correct answer.
Question 3 of 3 Landform Development
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Who among the following postulated the concept of geographical cycle of erosion?
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