In archaeology a chopper core is a suggestyed type of stone tool created by using a lithic core as a chopper following the removal of flakes from that core. They may be a very crude form of early handaxe although they are not bifacially-worked and there is debate as to whether chopper cores were ever used as tools or simply discarded after the desired flakes were removed. Archaeology, archeology, or archæology (from the Greek words αρχαίος = ancient and λόγος = word/speech/discourse) is the study of human cultures through the recovery, documentation and analysis of material remains and environmental data, including architecture, artifacts, biofacts, human remains, and landscapes. ... Ancient stone tools A stone tool is, in the most general sense, any tool made of stone. ... In archaeology, a lithic core is a distinctive artifact that results from the practice of lithic reduction. ... Olduwan, earlier spelled Oldowan or sometimes Oldawan, is an anthropological designation for an industry of stone tools used by prehistoric hominids of the Lower Paleolithic. ... In archaeology, a lithic flake is a thin, sharp fragment of stone that results from the process of lithic reduction. ... A hand axe is a bifacial Paleolithic core tool. ... Flint biface from Saint-Acheul, France. ...

They are found in the early Mode 1 tool industries of the Oldowan and Clactonian industries during the Lower Palaeolithic. Oldowan is an anthropological designation for an industry of stone tools used by prehistoric hominids in the very early Paleolithic. ... The Clactonian is the name given by archaeologists to an industry of European flint tool manufacture which dates to the early part of the interglacial period known as the Hoxnian, the Mindell-Riss or the Holstein interglacial (300,000-200,000 years ago). ... The Lower Paleolithic or Palaeolithic refers to the earliest period of human existence, the first of the three Paleolithic (Stone Age) periods. ...

Source

Ashton, NM, McNabb, J, and Parfitt, S, Choppers and the Clactonian, a reinvestigation, Proceedings of the Prehistoric Society 58, pp21-28, qtd in Butler, C (2005). Prehistoric Flintwork, Tempus, Stroud. ISBN 0752433407.