Guiana Shield Guiana Shield The Guiana Shield is one of the three cratons of the South American Plate. It is a 1.7 billion-year-old Precambrian geological formation in northeast South America that forms a portion of the northern coast. The higher elevations on the shield are called the Guiana Highlands, which is where the table-like mountains called tepuis are found. The Guiana Highlands are also the source of some of the world's most spectacular waterfalls such as Angel Falls, Kaieteur Falls and Kuquenan Falls. The Guiana Shield underlies Guyana (previously British Guiana), Suriname (previously Dutch Guiana) and French Guiana (or Guyane), most of
South American Cross Country Championships competition schedule featured long races for senior men and women, and shorter races for junior men and women. This was expanded in 1991 with the addition of a youth competition for younger runners. Keeping in line with changes to the IAAF World Cross Country Championships, the South American championships also held senior short race competitions between 1998–2006, to complement the established long races. The short races were removed from the programme after their removal from the World Championships in 2006. Brazil have been the most successful nation at the championships: they were undefeated in both of the long race team