Obsidian Cliff
Obsidian Cliff, also known as 48YE433, was an important source of lithic materials for prehistoric peoples in Yellowstone National Park near Mammoth Hot Springs, Wyoming, United States.[1][3] It is located about 13 miles (21 km) south of Mammoth Hot Springs, on the east side of the Mammoth-Norris section of the Grand Loop Road.Highly valued for its sharpness, Obsidian was used by Native Americans throughout the Western United States and Canada as knives, spear/arrow tips, and other ceremonial and sharp-edged objects.The kiosk was built in 1931 as part of an effort to provide interpretive exhibits along the park's Grand Loop Road.The interpretive exhibit was designed by National Park Service's Carl Russell, who provided many other innovations in visitor experiences.
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