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
French Guiana of its 281,612 inhabitants in 2018 lived in the metropolitan area of Cayenne, its capital. Since December 2015 both the region and the department have been ruled by a single assembly within the framework of a new territorial collectivity, the French Guiana Territorial Collectivity (). This assembly, the French Guiana Assembly (), has replaced the former regional council and departmental council, which were both disbanded. The French Guiana Assembly is in charge of regional and departmental government. Its president is Rodolphe Alexandre. Before European contact, the territory was originally inhabited by Native Americans, most speaking the Arawak language, of the