These five alternately beveled knife fragments were recovered from an archeological site along the Elk River in Montgomery County. Repeated sharpening on the knives alternate sides created the bevels. The three on the bottom are made of Permian chert and the one on the bottom right has been heat-treated prior to knapping to improve the knapping qualities of the chert. The two on the top row are made of an unknown chert. The site had house remains and is considered to be part of the Pomona focus of the Early and Middle Ceramic period. Pomona focus sites are located in eastern Kansas and western Missouri.

Date: 700-1500 CE