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 (band) Rockall (band) Rockall is a band named after the island off the west coast of Scotland, who nevertheless operate chiefly around the south of England, rather the northern homes of many members. The band plays largely instrumental dance music, mostly traditional tunes and original compositions with west-coast Scottish style melodies, with a variety of unlikely and increasingly reckless influences including classical baroque, reggae and 80s rock: Vivaldi's Mandolin Concerto (1st movement), Mark Knopfler and Jean-Jacques Goldman have been covered in live performances. Rockall was founded in 2006 by piper Robert Maclean with several short-term instrumentalists, and Ruairidh Howells as sound