Nauru is the small island country built on a raised coral island in Micronesia.
Nauru lies in the central Pacific, northeast of Australia, and is one of the world’s smallest independent states. Unlike a low coral atoll, which is close to sea level and usually surrounds a lagoon, Nauru is an uplifted coral island. Geological forces raised an ancient reef platform above the ocean, leaving a central plateau of phosphate-rich deposits.
Those phosphate deposits shaped Nauru’s modern history. Large-scale mining began under German administration in the early 20th century and later financed considerable public wealth after independence in 1968. Mining also removed much of the island’s central landscape, leaving a heavily degraded interior known as the Topside. Most settlement and infrastructure are concentrated around the coastal ring.
Palau, Tonga, and Seychelles are also small island countries, but they do not fit this particular geographic description. Nauru’s raised coral foundation is the identifying clue, while its location places it in Micronesia rather than Polynesia or the Indian Ocean.