Rockall part of the deeply eroded Rockall Igneous Centre that was formed as part of the North Atlantic Igneous Province, approximately 55 million years ago, when the ancient continent of Laurasia was split apart by plate tectonics. Greenland and Europe separated and the northeast Atlantic Ocean was formed between them, eventually leaving Rockall as an isolated islet. The RV "Celtic Explorer" surveyed the Rockall Bank in 2003. The Irish Light Vessel "Granuaile" (the same name as the steamer on the RIA 1896 botany survey) was chartered by the Geological Survey of Ireland, on behalf of the Department of Communications, Marine and
Rockall from 26 May 1985 to 4 July 1985 to affirm the UK's claim to the islet. In 1997, the environmentalist organisation Greenpeace occupied the islet for a short time, calling it Waveland, to protest against oil exploration. Greenpeace declared the island to be a "new Global State" (in this case qualifying it as a micronation) and offered citizenship to anyone willing to take their pledge of allegiance. The British Government's response was to state that "anyone is free to go there" and otherwise ignore them. During his one night on Rockall, Greenpeace protester and Guardian journalist John Vidal unscrewed the