Red and orange rock formations jut sharply from the ground, rising as much as a thousand feet in the air. The craggy, steep hills, which are called buttes, stretch for miles in every direction. They’re part of Badlands National Park in South Dakota. The land in the 244,300-acre park started to take shape 69 million years ago. Back then, the region was covered by ocean water. When the sea retreated, it left behind bits of rock called sediment. Half a million years ago, wind and rain began to erode the sediment, carving out buttes as well as slender rock towers called pinnacles.
For at least 11,000 years, Native Americans have called this region home. In fact, the Lakota people were the first to call the area mako sica, meaning “bad lands,” because of the area’s harsh temperatures, lack of water, and rugged terrain.
Badlands was established as a national park in 1978, and today the southern area of the park is on the Pine Ridge Reservation, which means that members of the Oglala Sioux tribe help manage the land.
Now scientists study rocks in the park to find out how the environment here has changed over time. The rocks also contain clues about what types of animals once lived in the area. Archaeologists have unearthed the fossil of an ancient creature called the sabertooth cat as well as the bones of rhino ancestors.
Badlands National Park isn’t completely filled with buttes and pinnacles. Areas with these rock formations are surrounded by grasslands, which support bison, prairie dogs, and other animals. And the land in the park is still changing. The rock formations continue to erode—up to an inch a year in some spots. Eventually wind and water will wear down the entire Badlands until it becomes flat land. Luckily you still have plenty of time to visit and gawk at those rocks!