Physiography of India

Geography and Environment

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Indian Economy - Understanding the basics of Indian economic system

Consider the following statements:

1. The western coastal plains are emergent whereas the eastern coastal plains are submergent.

2. The western coast consists of recent tertiary alluvial deposits, whereas the eastern coast is dominated by lagoons.

Which of the statements given above is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 nor 2

The Peninsular plateau of India is flanked by narrow coastal plains of varied width from north to south, known as Western coastal plains and the East coastal plains. These coastal plains differ from each other. They were formed by the depositional action of the rivers and the depositional and erosional action of the sea waves. According to geologists their origin maybe attributed to the faulting and subsidence of Arabian Sea and the Bay of Bengal.
Statement 1 is incorrect. The western coastal plains show evidence of emergence in the south on the Malabar coast (Kerala). From the coast of Gujarat till Malabar the western coastal plains are submergent in nature. The eastern coastal plains are emergent on the other hand.
Statement 2 is incorrect. The eastern coastal plains are formed by the alluvial fillings of the littoral zone comprising some of the largest deltas in the world. Thus, the eastern coastal plains and not the western coastal plains consist mostly of recent and tertiary alluvial deposits. The Western coastal plains are dominated by shallow backwaters and lagoons known as Kayals and Teris.