evidence: Rockall (/ˈrɒkɔːl/) is an uninhabitable granite islet in the North Atlantic Ocean. The United Kingdom claims that Rockall lies within its territorial sea[1] and is part of its territory, but this claim is not recognised by Ireland.[2][3] It and the nearby skerries of Hasselwood Rock and Helen's Reef are the only emergent parts of the Rockall Plateau. The rock was formed by magmatism as part of the North Atlantic Igneous Province during the Paleogene. [...] In 1997, three members of the environmentalist organisation Greenpeace occupied the islet for 42 days,[36][37] calling it Waveland, to protest against oil exploration. Greenpeace declared the island to be a "new Global State" (as a spoof micronation) and offered citizenship to anyone willing to take their pledge of allegiance. The British Government's response was to state that "Rockall is British territory. It is part of Scotland and anyone is free to go there and can stay as long as they please"[38] and otherwise ignore them. The 1955 plaque was unscrewed and refixed back to front, and subsequently it disappeared.[39] [...] The United Kingdom of Great Britain and Northern Ireland claims Rockall along with a 12-nautical-mile-radius (22 km) territorial sea around the islet inside the country's exclusive economic zone (EEZ).[1] The UK also claims "a circle of UK sovereign airspace over the islet of Rockall".[1]