|Governing body||Nevada Division of State Parks|
|NRHP Reference #||10000443|
|Added to NRHP||July 8, 2010|
Gypsum Cave was inhabited between 8500 BC and 6500 BC by the giant ground sloth. The 300 by 120 feet (91 by 37 m) six room cave was first documented by Mark Harrington in a 1930 edition of Scientific American.
Human habitation of the cave dates to around 3000 BC. M.R. Harrington provided the first documentation of the contents of the cave following excavation in 1930-1931. Human habitation was at the same time as at other local sites like Tule Springs, Lake Mojave and the Pinto Basin. The cave contains six rooms and is measured at 320 feet long by 120 feet wide. The skull of the giant ground sloth Nothrotherium shastense Sinclair was found in Room 3 by the archaeologist Bertha Parker, who was M.R. Harrington's niece and served as expedition secretary. Excavators also found the dung, backbone, claws and reddish-brown hair of the now-extinct ground sloth. Through radiocarbon dating, it was proposed that the remains of the sloth dated back to 8500BC.  The feces has given information about what the environment and vegetation of the area was because the sloth was a herbivore. This ancient plant eater survived on capers, mustards, lilies, grasses and grapes. Because of the dry climate in Nevada, this seemed unusual. However, during this period, many lakes and ponds were formed by the melting of the glaciers after the last ice age. The geology of the area shows that the closest water supply was between 6–12 miles (9.7–19.3 km) away.
- "Weekly List of Actions Taken on Properties: 7/06/10 through 7/09/10". National Register of Historic Places. National Park Service. July 16, 2010. Retrieved August 7, 2010.
- "Gypsum Cave". Retrieved 2010-08-05.
- "Gypsum Cave". ShoppingPoints.com. Retrieved 2010-08-05.
- "Gypsum Cave". Nevada State Historic Preservation Office. Retrieved 2010-08-05.
- Land, Barbara; Land, Myrick. A short history of Las Vegas. p. 6. Retrieved 2010-08-05.
- Harrington, M.R. (April 1940). "Man and Beast in Gypsum Cave". Desert Magazine: 3–5.