4. The Coastal plains:

The peninsular plateau is also flanked by coastal strips or belts in the east and the west along the Bay of Bengal and the Arabian Sea respectively.

- The Western coastal plain:

This plain lies between the Western Ghats and the Arabian Sea. It extends from Gujarat in the north to Kanyakumari in the south. It is a narrow belt with an average width of 65 kilometres. This plain is divided into three parts. The northern part extending from Mumbai to Goa is known as the ‘Konkan’ plain while the middle and southern part are known as the ‘Kannad’ and the ‘Malabar’ plain respectively. The ‘Konkan’ plain is characterised by estuaries while the ‘Malabar’ plain has backwaters and lagoons.

- The Eastern coastal plain:

This is a wide plain which runs along the Bay of Bengal parallel to the Eastern Ghats from Orissa to Kanyakumari. This plain is divided into two parts. The northern part lying between the Mahanadi and the Krishna rivers is known as the North Circar plain. The southern part between the Krishna and the Cauvery is known as the Carnatic or Coromandel plain.

5. The Islands:

The Lakshadweep Islands:

These are small coral Islands located in the Arabian Sea. They extend towards the north of Maldives. None of them are more than a couple of square kilometres in area.

The Andaman and Nicobar Islands:

These islands are located in the Bay of Bengal. These islands are larger than the Lakshadweep islands. Some of them are volcanic.