Coconut Island, Udupi, India

There are four large islands in the St.Marys Islands group, namely Coconut Island, North Island, Darya Bahadurgari Island and South Island. Out of the four Islands the one from St.Marys Islands the northern most Island has a basaltic rock formation in a hexagonal form, the only one of its type in India. The rocks have very well-developed columnar joints and hence the island has been gifted by the Karnataka state Government to the Geological Survey of India which has declared the rocks as a national Geological Monument.

St.Marys Island is located at about 6 Km NNW of the port of Maple in South Kanara district, Karnataka and about 670 Km South of Mumbai, India.

Check this out -

https://wegeolize.com/2017/09/03/natures-glory-at-st-marys-island-india/%3Cbr%3E%3Cbr%3ETo?utm_source=LBB&ref=lbbpost know how it's formed and the history.