Individual #Eolithic_Age  the earliest part of the Stone Age marked by the earliest signs of human culture
  instance of:  time_period
  part of:  Stone_Age  (archeology) the earliest known period of human culture, characterized by the use of stone implements
     part of:  prehistory  the time during human development before the appearance of the written word

No statement uses or specializes Eolithic_Age; click here to add one.