Gilbert and Ellice Islands until 1977. A protectorate was generally established over this area (but not over these islands) by the Pacific Islanders Protection Act of 1857 and then in 1877 for the Western Pacific Territories. The sixteen islands of the Gilberts were declared a British Protectorate by Captain Davis R.N., of between 27 May and 17 June 1892. The Ellice Islands were declared a British Protectorate by Captain Gibson R.N., of , between 9 and 16 October of the same year. The British Western Pacific Territories (BWPT) were administered by a High Commissioner resident in Fiji. A Resident Commissioner, Charles Swayne, was appointed
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