It has seemed to me, as it has to him, that the solution of dead coral rock in the interior of a reef does not sufficiently account for the formation of lagoons, and that the true cause of the ...

Darwin also proposed a theory of how isolated rings of coral reefs, known as atolls, formed. He suggested that they originally ... through an atoll in the Pacific Ocean and found volcanic rocks ...

The southern reaches of the archipelago are where Palau's most characteristic geological features rise in strange formations ... Suddenly, the coral reef is illuminated; this is the Palauan ...

Corals helped Darwin refine his ideas about evolution. His first scientific book after returning from the voyage of the Beagle was an account of the formation of coral reefs.

Declared a UNESCO World Heritage Site in 1996 – along with six other areas surrounding Belize's barrier reef ... and rock formations. You'll likely spot marine life lining the coral wall ...