 The concept of the "Epipalaeolithic" arrived several decades after the main components of the three-age system, the Paleolithic, Mesolithic and Neolithic.It was first proposed in 1910 by the Swedish archaeologist, Knut Stjerna, his initial example being a culture or sub-culture in Scandinavian archaeology, that would not be often called Epipalaeolithic today.This left stone-lined pit graves containing implements of bone, such as harpoon and javelin heads.