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Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded. [1] They are characterized by steep slopes, minimal vegetation, lack of a substantial regolith, and high drainage density. [2] Ravines, gullies, buttes, hoodoos and other such geologic forms are common in badlands.
Badlands National Park. The geology of South Dakota began to form more than 2.5 billion years ago in the Archean eon of the Precambrian.Igneous crystalline basement rock continued to emplace through the Proterozoic, interspersed with sediments and volcanic materials.
Badlands in the northern portion of Pine Ridge Indian Reservation Badlands in 1939 (45 miles southeast of Rapid City) As part of the World War II effort, the U.S. Army Air Force (USAAF) took possession of 341,726 acres (533.9 sq mi; 1,382.9 km 2 ) of land on the Pine Ridge Indian Reservation , home of the Oglala Sioux people, for a gunnery range.
Badlands National Park is located in southwestern South Dakota, east of the Black Hills. It's about 75 miles away from the state's second-most populous city, Rapid City. The nearest major airport ...
The Bisti/De-Na-Zin Wilderness is the largest area of badlands in the San Juan Basin that is easily accessible to the public. [7] The badlands expose the longest, most complete, and most richly fossiliferous sequence of beds spanning the Cretaceous-Paleogene boundary in any single sedimentary basin in the world. [8]
The Painted Desert is a United States desert of badlands in the Four Corners area, [2] running from near the east end of Grand Canyon National Park and southeast into Petrified Forest National Park. It is most easily accessed from the north portion of Petrified Forest National Park.
Fossils may be found either associated with a geological formation or at a single geographic site. Geological formations consist of rock that was deposited during a specific period of time. They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed.
Pull-apart basin – Type of basin in geology; Quarry – A place from which a geological material has been excavated from the ground; Rift – Part of a volcano where a set of linear cracks form; Sea cave – Cave formed by the wave action of the sea and located along present or former coastlines