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 Geology of the Pacific Ocean The Pacific Ocean evolved in the Mesozoic from the Panthalassic Ocean, which had formed when Rodinia rifted apart around 750 Ma. The first ocean floor which is part of the current Pacific Plate began 160 Ma to the west of the central Pacific and subsequently developed into the largest oceanic plate on Earth. The tectonic plates continue to move today. The slowest spreading ridge is the Gakkel Ridge on the Arctic Ocean floor, which spreads at less than , while the fastest, the East Pacific Rise near Easter Island, has a spreading rate of over