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
East Sioux Falls, South Dakota to the incorporation of East Sioux Falls as a municipality. Numerous structures were built in East Sioux Falls including worker's cottages, post office, town hall, depot, school house, general store, hotel, grain elevator, stable, saloons and jail. The remains of several buildings are still visible within the nature area. The quarried stone was cut into building stones and paving blocks and shipped to construction projects throughout the country. The pink quartzite was superior in quality to other stones and possessed a coloring which was extremely delicate and pleasing to the eye. The stone was used in the construction of several