Tuvalu at the Pacific Games similarly rotated on a four-year basis in the intervening years between the main games. A combined Gilbert and Ellice Islands team participated at the 1963, 1966, and 1971 South Pacific Games. An athlete from Tuvalu (then Ellice Islands), namely Nelu Arenga, is at least documented for 1971. Athletes from Tuvalu attended the 2003 South Pacific Games for the first time. Logona Esau was the first athlete from Tuvalu to win a medal at an international competition, when he took bronze at the 2005 South Pacific Mini Games in Koror, Palau. Tuvalu competed at the 2007 Pacific Games in Apia, Samoa.
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