Postage stamps and postal history of Tuvalu Postage stamps and postal history of Tuvalu Tuvalu is a Polynesian island nation located in the Pacific Ocean, midway between Hawaii and Australia. Its nearest neighbours are Kiribati, Nauru, Samoa and Fiji. It comprises four reef islands and five true atolls. Its population of 10,472 makes it the third-least populous sovereign state in the world. In terms of physical land size, at just Tuvalu is the fourth smallest country in the world. Tuvalu was formerly the Ellice Islands, part of the Gilbert and Ellice Islands which split into Kiribati and Tuvalu upon gaining independence from the United Kingdom in 1978
Geology of the Pacific Ocean Plate in the north, the Cocos Plate off today's Central America, and the Nazca and Phoenix Plates in the southern Pacific. Charles Darwin had proposed a theory of the slow subsidence of the ocean floor based on his studies of Pacific oceanic islands, seamounts (underwater volcanoes) and guyots (flat-topped seamounts). His observations have been verified and expanded in the development of plate tectonic theory. The tectonic plates continue to move today. The slowest ridge spreading rate is across the Gakkel Ridge in the Arctic Ocean which separates at less than 2.5 cm/yr while the fastest, across the East Pacific Rise