Define Coral Islands And Volcanic Islands

(i) Define Coral Islands and Volcanic Islands. (ii) Define Lagoons.


(i) Coral Islands: When Coral polyps die, their skeletons turn into large masses of white calcium carbonate, giving rise to white sands. Lakshadweep is coral island.
Volcanic Islands: Many of the islands of the Andaman and Nicobar are volcanic in nature.
(ii) Lagoons are salt water lakes which are almost separated from the Sea by the formation of sandbars along the coast.