List of National Natural Landmarks in South Dakota
From List of National Natural Landmarks, these are the National Natural Landmarks in South Dakota.
Name | Image | Date | Location | County | Description | |
---|---|---|---|---|---|---|
1 | Ancient River Warren Channel | 1965 | Grant | A channel cut by the Ancient River Warren during the Ice Age. | ||
2 | Bear Butte | ![]() |
1965 | Meade | A cone-shaped mass of igneous rock standing alone 1,300 feet (400 m) above the surrounding plains. | |
3 | Bijou Hills | 1976 | Charles Mix | An excellent example of an erosional remnant of soft clays and shales capped by a channel sandstone and quartzite. | ||
4 | Buffalo Slough | 1980 | Lake | Excellent examples of a prairie pothole with native emergent vegetation, and a native bluestem prairie. | ||
5 | The Castles | 1976 | Harding | Steep-walled, flat-topped buttes standing 200 to 400 feet (61 to 122 m) above the surrounding prairie. | ||
6 | Cathedral Spires and Limber Pine Natural Area | ![]() |
1976 | Custer | An excellent, rare example of joint-controlled weathering of granite. | |
7 | Cottonwood Slough- Dry Run | 1975 | Roberts | A completely undisturbed wetland complex including potholes, streams, shallow open water, lakes, and marsh. | ||
8 | Fort Randall Eagle Roost | 1967 | Gregory | A prime winter roosting area for bald and golden eagles. | ||
9 | Lake Thompson | 1975 | Kingsbury | Contains a large undisturbed and unmanipulated marsh, an outstanding waterfowl breeding and resting area. | ||
10 | Mammoth Site of Hot Springs | ![]() |
1980 | Fall River | One of the largest concentrations of mammoth remains in the United States. | |
11 | Red Lake | 1975 | Brule | One of the largest remaining natural and unmanipulated prairie pothole lakes. | ||
12 | Sica Hollow | 1967 | Marshall | Displays many facets of natural history. | ||
13 | Snake Butte | 1967 | Jackson | Illustrates one of two types of sand calcite deposits in the world. | ||