Benue Trough the Central African Shear Zone and for the volcanic island of St. Helena in the Atlantic ocean. Three periods of magmatic activity (volcanic action) have been identified, 147–106 Ma, 97–81 Ma and 68–49 Ma. The first is prominent in the north of the trough, and contemporary with magmatism in Brazil, probably occurring during a period of crustal extension before the Atlantic started to open. The second is found only in the south of the trough, and may belong to a period when the extension of the Atlantic had slowed down, ending with a period of compression. The third and last
Rockall Rockall" sailing race, sponsored by Galway Bay Sailing Club, runs from Galway, Ireland, around Rockall and back. It was held in 2012 to coincide with the finish of the 2011–12 Volvo Ocean Race around the world. The 2015-2016 Clipper Round the World Yacht Race race 12 from New York to Londonderry was extended around Rockall despite previous promises to crew from Sir Robin Knox-Johnston that this would not happen again after the race to Danang. In 2017, the Safehaven Marine team led by Frank Kowalski set a world record for the Long Way Round Circumnavigation of Ireland via Rockall island.