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The oldest rocks in South Dakota date to the Archean eon of the Precambrian, over 2.5 billion years ago.The Archean crystalline basement rock formed with the intrusion of the Little Elk and Bear Mountain granites, with interceding periods of volcanic activity, mountain building and shale deposition.
The present site of Devils Lake is historically territory of the Dakota people.The Sisseton, Wahpeton, and Cut-Head bands of Dakotas were relocated to the Spirit Lake Reservation as a result of the 1867 treaty with the United States that established a reservation for Dakotas who had not been forcibly relocated to Crow Creek Reservation in what is now called South Dakota.
The Black Hills is an isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, United States. [3] Black Elk Peak , which rises to 7,242 feet (2,207 m), is the range's highest summit. [ 4 ]
Bear Butte is a geological laccolith feature located near Sturgis, South Dakota, United States, that was established as a State Park in 1961. An important landmark and religious site for the Plains Indians tribes long before Europeans reached South Dakota, Bear Butte is called Matȟó Pahá, [2] or Bear Mountain, by the Lakota, or Sioux.
The Dissected Till Plains, an area of rolling hills and fertile soil that covers much of Iowa and Nebraska, also extends into the southeastern corner of South Dakota. The Black Hills are a group of low mountains in the southwestern part of the state. The Missouri Coteau lies between the James River Basin of the Drift Prairie and the Missouri ...
The Black Hills of South Dakota is one of the few remaining exposed portions of the Trans-Hudson orogenic belt. The peaks of the Black Hills are 3,000–4,000 feet (910–1,220 m) above the surrounding plains, while Black Elk Peak – the highest point in South Dakota – has an altitude of 7,242 feet (2,207 m) above sea level. [ 4 ]
The present site of Devils Lake was, historically, a territory of the Dakota people. However, the Sisseton, Wahpeton, and Cut-Head bands of the Dakotas were relocated to the Spirit Lake Reservation as a result of the 1867 treaty between the United States and the Dakota that established a reservation for those who had not been forcibly relocated to Crow Creek Reservation in what is now South ...
In South Dakota, most of the eastern part of the state is covered by the Drift Prairie. The Missouri River cuts through the center of the state. To the east of the river are low hills and lakes formed by glaciers referred to as the Drift Prairie. The area is bordered on the east by the Minnesota River Valley and on the west by the James River ...