This milling stone was excavated in 1986 during a highway salvage project at the Mem site, undertaken by Kansas Historical Society archeologists and Kansas Anthropological Association volunteers. This groundstone tool was used as the lowermost stone for grinding plant material. Groundstone tools like this one are made by pecking a hard stone into a rough shape and then grinding and polishing it into its final state. The Mem site, in Marion County, is a Great Bend aspect, ancestral Wichita village site.