Gilbert and Ellice Islands Gilberts or secede. They were told that if they separated they would not receive royalties from the Ocean Island phosphate or other assets of the colony. Despite this, 3799 Tuvaluans (92%) voted to secede, while 293 voted against secession. On 1 October 1975, legal separation from the Gilbert Islands (now Kiribati), took place. On 1 January 1976, full administration of the new colony was transferred to Funafuti from Tarawa. Tuvalu became an independent constitutional monarchy and the 38th member of the Commonwealth on the 1 October 1978. The Gilbert Islands attained independence on 12 July 1979 under the name Kiribati
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