Islands

⇒ Land masses surrounded by water from all the sides are called Islands. It may occur in oceans, seas, lakes or rivers. A group of islands is called archipelago. On the basis of their origin, Islands are classified into –

1. Tectonic Islands: The islands are formed due to the subsidence of land, upliftment of land in sea areas, formation of rift valleys, or segmentation of continental parts, all due to tectonic activities. Eg. West Indies.

2. Volcanic Islands: Volcanic eruption gets deposited in the water body to such a height that it emerges out of the water surface and looks like Islands are called Volcanic Islands. E.g. Hawaiian Islands.

3. Erosional Islands : Soft rocks are subjected to easy erosion, but certain hard portions remain found here and there. When these scattered positions of hard rocks are surrounded by water from all sides, Erosional islands are formed. E.g. Greenland.

4. Depostional Islands: These islands are formed by the deposition of sediments brought by rivers, glaciers and sea waves on the surface.

5. Coral Islands: The islands formed by the accumulation of coral polyps on the sub-marine platforms of the tropical oceans are called Coral islands. E.g. Lakshadweep, Maldives etc.

Follow on Facebook page – Click Here

Google News join in – Click Here

Read More Asia News – Click Here

Read More Sports News – Click Here

Read More Crypto News – Click Here