[1] It was formed by the uplift of an underwater volcano, which last erupted in the Pleistocene, at least 11,000 years ago.The volcano reaches a height of 666 m (2,185 ft) and gives the island an area of 11 km2 (4.2 sq mi).[2]: 806 The top of the Pliocene part of the basaltic andesite volcano is overlain by a 4 km2 (1.5 sq mi) mid-Pleistocene cap of limestone called the Tanafu Plateau.[2]: 805, 813 The Tanafu Plateau is the 160 m (520 ft) thick deposits of the lagoon bottom of this original reef.He is more well known to the local Futunese, as he had made a bigger impact to the establishments of churches around the island, and had brought many to be converted and baptised.The island has ten regions: Iraro, Itapapa, Itapasiesi, Matangi, Matowei, Nabao, Nariari, Rakaoroa, Serinao, and Tchinaroa.It is common in Futuna to participate in dance groups to perform in any occasion whether it be weddings, religious events or commemorate national holidays.