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
Sioux Falls, South Dakota Sioux Falls, South Dakota Sioux Falls () (Lakota: "Íŋyaŋ Okábleča Otȟúŋwahe"; "Stone Shatter City") is the most populous city in the U.S. state of South Dakota and the 143rd-most populous city in the United States. It is the county seat of Minnehaha County and also extends into Lincoln County to the south. It is the 47th-fastest-growing city in the United States and the fastest-growing metro area in South Dakota, with a population increase of 22% between 2000 and 2010. As of 2018, Sioux Falls had an estimated population of 183,200. The metropolitan population of 259,094 accounts for 29% of South