Gilbert and Ellice Islands of Makin that commenced on 20 November 1943. Colonel Fox-Strangways, was the Resident Commissioner of the Gilbert and Ellice Islands Colony in 1941, who was located on Funafuti. After World War II, the colony headquarters was re-established on Tarawa, first on Betio islet and subsequently on Bairiki islet. By the Tokelau Act of 1948, sovereignty over Tokelau was transferred to New Zealand. The five islands of the Central and Southern Line Islands were added to the colony in 1972. The Tuvaluans were concerned about their minority status in the Gilbert and Ellice Islands Colony. In 1974, ethnic differences within the
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