Which of the following statements is/are correct?1. Erosion features d...
Along high rocky coasts, waves break with great force against the land shaping the hill sides into cliffs. With constant pounding by waves, the cliffs recede leaving a wave-cut platform in front of the sea cliff. While along the low sedimentary coasts, the rivers appear to extend their length by building coastal planes and deltas. Wave is the most important agent in rocky as well as sedimentary coasts.
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Which of the following statements is/are correct?1. Erosion features d...
1. Erosion features dominate in high rocky western coast of India while depositional features dominate in low sedimentary eastern coast of India.
The statement is correct. The western coast of India, which is characterized by high rocky cliffs and steep slopes, experiences intense wave action and strong oceanic currents. These erosional forces lead to the formation of various features such as sea caves, sea arches, and sea stacks. On the other hand, the eastern coast of India, which is predominantly composed of sedimentary deposits, is characterized by low-lying and relatively flat terrain. The deposition of sediments by rivers and the gentle wave action along this coast lead to the formation of depositional features such as beaches, sandbars, and deltas.
2. Wave-cut platform is a feature of rocky coasts while delta formation is a feature of sedimentary coasts.
The statement is correct. A wave-cut platform is a flat, rocky surface that forms at the base of a cliff or steep shoreline due to the continuous erosion by waves. Because rocky coasts are more resistant to erosion, the wave action removes the weaker rocks at the base of the cliffs, leaving behind a platform. This feature is commonly found along high rocky coasts. On the other hand, delta formation is a characteristic feature of sedimentary coasts. Deltas are landforms formed at the mouths of rivers where their sediment-laden waters enter a body of water with lower energy, such as a lake or an ocean. The sediment carried by the river gets deposited, leading to the accumulation of sediment and the formation of a delta.
3. Oceanic current is the dominating geomorphic agent in rocky coast as compared to wave in sedimentary coasts.
The statement is correct. In rocky coasts, the dominant geomorphic agent is the oceanic current. Oceanic currents are strong, continuous flows of water in the ocean, and they play a major role in shaping the rocky coasts through erosion. The powerful currents interact with the rocks, leading to the formation of erosional features such as cliffs, sea caves, and sea stacks. On the other hand, in sedimentary coasts, wave action is the dominant geomorphic agent. Waves are generated by wind and they act on the sediments along the coast, leading to their erosion and deposition. The deposition of sediments by waves is responsible for the formation of depositional features such as beaches and sandbars.
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