they are made of sedimentary rocks, but I'm not sure of their actual make-up.
I'm not sure if this is true, but I've heard it is made out of the sedimentary rock, sandstone, and other things like coal.
Semantory
Badlands National Park is made up of poorly lithified siltstones and mudstones.
The Badlands is an area in southwestern South Dakota, with sharply eroded buttes, pinnacles and spires made of rock.
They form by earthquakes
it is made up of the type of rock that is called the ciarra rock its mostly made in purto rico and france
there made from your momma
Igneous Rocks, metamorphic rocks, and sedimentary rocks
It's a big place. According to the Canadian Badlands website, www.canadianbadlands.com the Canadian Badlands covers "a broad swath of southern and eastern Alberta". A map there shows that it extends roughly south from Red Deer, Alberta to the border with the state of Montana - about 450km or 280 miles, and east from Calgary to the border with the province of Saskatchewan - about 350km or 220 miles. That would make it approximately 157,500 to 159,543 square kilometres, or 60,811 to 61,600 square miles in area.
Badlands National Park
The Sioux Lakota Native Americans were the first to call the area known today as Badlands National Park in South Dakota, "mako sica" or "land bad." Extreme temperatures, lack of water, and the exposed rugged terrain led to this name. In the early 1900′s, French-Canadian fur trappers called it "les mauvais terres pour traverse," or "bad lands to travel through." Today, the term badlands has a more geologic definition. Badlands form when soft sedimentary rock is extensively eroded in a dry climate. The area's typical scenery of sharp spires, gullies, and ridges is a premier example of badlands topography.
Franklin D. Roosevelt.