These two alternately beveled knife fragments were recovered from an Early Ceramic village in Montgomery County. The site had at least one house and may represent a Pomona occupation. Radiocarbon dating on a burned post gave a date of 800-1000 CE. Archeologists believe that knives shaped like these would have been used for bison butchering. They can be alternately sharpened on all four sides or on two alternate sides. One knife has an exposed portion of a fossilized segmented worm, Spriggina floudersi. The other knife was made of a chert called Tahlequah, that outcrops in eastern Oklahoma.