Which of the following statements are true regarding Esker and Drumlin? 1. Eskers are ridges of crudely bedded gravel and sand. 2. Drumlins are mostly made of boulders and clay. 3. Egg basket topography is characteristic of areas with eskers. 4. While eskers are formed by the currents of glaciers, drumlins are produced by the action of glaciers. Select the correct answer from the options given below.
- A1, 2 and 3
- B1, 2 and 4
- C3 and 4 only
- D1 and 2 only
- Enone of the above / more than one of the above
Show answer and explanation
Correct answer: (b) 1, 2 and 4
Explanation
Eskers are long and narrow ridges formed by the deposition of debris by meltwater streams originating from glaciers. They are composed mainly of gravel, sand and stones. Drumlins are depositional landforms formed by glacial action and are mainly composed of boulder clay. Their shape resembles an inverted boat or a truncated inverted egg. The egg-basket topography is a characteristic feature of drumlin-dominated regions.