Which one among the following is not a coral reef island?

Which one among the following is not a coral reef island?

Great Barrier Reef, Australia

Rainbow Reef, Fiji

Swaraj Island, India

Kyushu Island, Japan

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CDS-2 – 2020

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Kyushu Island, Japan, is not a coral reef island. It is one of the four main islands of Japan, primarily formed through volcanic and continental processes.

Coral reef islands are formed from the accumulation of coral skeletal remains and other organic materials over geological time. Examples include atolls and cays.

The Great Barrier Reef (Australia) is the world’s largest coral reef system, containing numerous coral cays and islands. Rainbow Reef (Fiji) is a famous barrier reef system with associated islands. Swaraj Island (Havelock Island) in the Andaman and Nicobar Islands is known for its beautiful beaches and surrounding coral reefs, but the island itself is not solely a coral formation; it is part of a volcanic arc. Kyushu, however, is a large, geologically diverse continental island.

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