They were found next to bones, and it was clear that these stones had been shaped into butchering tools to strip meat and break into the bones of animals killed on the savannah.

这类岩石同动物骨头一起被发现，而且很明显地可以看出这些石头被加工成为可以各种屠宰工具，可以用于在大草原上被猎杀的动物躯体上剥肉、削骨。