In these areas people needed the tools for hunting large-size animals such as mammoth and bison that were well adjusted in the cool climate of the diluvial epoch, and various forms of points came to be used as the head of javelins.
これらの地域ではマンモスやバイソンなど洪積世の寒冷気候を好んだ大形獣を対象とする狩猟具が求められ、投げ槍の槍先として用いられた各種尖頭器の出現をみた。