Question

How are Narcondam and Barren islands formed?

Answer 1

Hint: A high island, often known as a volcanic island, is a volcanically formed island. The phrase can be used to differentiate these islands from low islands, which are generated by sedimentation or coral reef raising. Because high islands over a particular size are more likely to have fresh groundwater than low islands, high islands are more likely to be inhabited.

Complete answer:
Both the Narcondam and the Barren are volcanic islands that were formerly active but are now extinct.
Narcondam Island is a small volcanic island in the Andaman Sea's northern reaches. It is India's easternmost island, with a high of 710 metres above sea level. The Andaman Islands include this island.

There have been reports of mud and smoke being thrown from the volcano that built Narcondam Island. As a result, this island is also referred to as a volcanic island. The island is small, measuring around 6.8 square kilometres in size. The Geological Survey of India classed it as a dormant volcano.

The barren island is part of the Indian Union Territory of Andaman and Nicobar Islands and is located in the Andaman Sea. This is South Asia's only confirmed active volcano. Volcanic eruptions create this landscape. Basalts and basaltic andesites are the most common lava types found on Barren Island.

Note: In the year 1787, the first volcanic eruption occurred. This island is located on the edge of the Indian and Burmese tectonic plates, in the midst of a volcanic belt. The highest point on the island is 353 metres, and the majority of the primitive volcano is submerged.