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
Potaro River village located in forested terrain along the Potaro River south of Kaieteur Falls. Menzies Landing, a small settlement that is a 20-minute walk upriver from Kaieteur Falls, is the main staging area for up river travel. Up river from the falls, the Potaro Plateau stretches out to the distant escarpment of the Pakaraima Mountains. Placer gold and diamonds are extracted from the river in this mineral-rich area. Individuals who pan for gold are referred to as Porkknockers. In the first half of the 20th century miners, employing primitive methods, recovered significant quantities of gem-quality diamonds from the area's rivers and