Prairie in Badlands National Park of South Dakota. Badlands National Park consists of 244,000 acres of sharply eroded buttes, pinnacles and spires blended with the largest, protected mixed grass prairie in the United States. The park has been shaped by erosion, and is home to many Oligocene fossils.
Summit of Harney Peak in the Black Hills of South Dakota, composed of Precambrian granite. Harney Peak at an elevation of 7,242 feet, is the highest peak in South Dakota as well as the center of the Harney Peak batholith.
Trellis drainage through the Badlands of South Dakota. Trellis drainage is an arrangement of surface drainage characterized by parallel main streams that have right-angle tributaries. It is commonly developed where the beveled edges of alternating hard and soft rocks outcrop in parallel belts.