This 3/4 grooved axe was collected from a sand bar in Jefferson County and donated to the Kansas Historical Society in 2015. While 3/4 grooved axes are frequently recovered from late Archaic sites, there use is not restricted to that time period. Axes like these are made by pecking a hard stone into a rough shape and then grinding and polishing it into its final state. As the axe was made seven small concavities were revealed in the stone. Axes like this one get their name from the hafting groove the encircles 3/4 of its body.