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 Sioux Falls, South Dakota Falls incorporated by a 63-0 vote. Pettigrew wanted to build a suburb of Sioux Falls to the south and west. Once nearly covering , South Sioux Falls once boasted a woolen mill, soap factory, an axle grease factory, a six story factory plant and Sioux Falls' first airport Soo Skyways. City hall was located at the corner of 41st Street and Covell Avenue. In the 1950 census the city was estimated to have a population of nearly 1,600, making it the third largest city in the county after Sioux Falls and Dell Rapids. On October 18, 1955 South Sioux Falls