From the 1950s to the 1970s, R.B. Aker of Parkvile, Missouri recorded many prehistoric sites within a 20-mile distance of the Missouri River in Platte County, Missouri. This three-quarter grooved axe was collected from site 23PL47 and was part of a large donation to the University of Kansas by Mr. Aker in 1988. Made from a hard igneous or metamorphic rock, this style of artifact first appears in the Archaic and persists to later times. The groove is made for mounting the tool on a wooden or bone handle.