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 Bank dispute "Faroes-Rockall Plateau", an "elevated plain with its summit in the Faroe Islands". Iceland does not claim the rock itself, considering it irrelevant as far as delimitation of EEZs and continental shelf is concerned. Iceland however claims an extended continental shelf in the Hatton-Rockall area. Despite its long history of human habitation into the 20th century, Iceland considers St. Kilda to be "a minuscule, effectively uninhabited, islet, categorized under article 121(3) of the Law of the Sea Convention". Furthermore, St. Kilda lies outside the British territorial sea limit. Therefore, it is not an "equitable basepoint for an equidistant line". Iceland ratified