12019-05-08T15:43:28-07:00Emilia Porubcin63ec028064958b3240cc8e4e010f355faa0c8e12332304Cores—purposefully shaped nodules of stone—were used as a “blank” starting point from which toolmakers would strike off flakes with a hammer stone in order to make implements. Toolmakers could also shape the core itself into an implement.plain2019-05-14T22:40:30-07:00Excavated by Heyward Walter Seton-Karr and donated to Stanford ca. 1908Emilia Porubcin63ec028064958b3240cc8e4e010f355faa0c8e12