The Vore Buffalo Jump is an archeological site in Crook County, Wyoming. A sinkhole, formed where gypsum soil was eroded, leaving a steep-sided pit about 40 feet (12 m) deep and 200 feet (61 m) in diameter. Native American hunters could stampede bison in the direction of the pit, which was deep enough to kill or disable the animals that were driven into it. The location is one of a number of buffalo jump sites in the north central United States and southern Canada. The Vore site was used as a kill site and butchering site from about 1500 AD to about 1800 AD. Archeological investigations in the 1970s uncovered bones and projectile points to a depth of 15 feet (4.6 m). About ten tons of bones were removed from the site. About five percent of the site has been excavated, and the pit is estima