Re- use of Neolithic blade cores

In South Limburg and the surrounding area,  blade - core stones can be found with impressions of blade negatives. Similar core stones were  already used in the late Palaeolithic and especially by  the Magdalenian (from approximately 13,000 years ago). 
Neolithic blade -cores sometimes were discarded immediately ( see image 1) , since the  raw material was abundant. Some blade core negatives were secondary used as a hammerstone, visible by the battered surface.
Sometimes, however, the core stone has been re- used as a hand tool 

Secondary use of Neolithic stone core is easy to determine. Often we find two or three precise blows, for using the core, , leaving a small cove to fit in  the thumb and forefinger or  other fingers). This was obviously applied to blade-core stones where it was still a possibility to use them as a heavy scraper tool for decortification, etc. The used edge on the core is often showing a zig- zag pattern.
Schematic image of a blade core

Schematic image of a blade core , which has been used secondary as a tool A+B grip, C = sharpened edge

Unmodified blade core

Neolithic blade cores of Hesbaye type flint  from the Mt. St. Pierre, Belgium. The top left core is a renewed core, where the earlier platform had become  useless; top right we distinguish two parallel blows, which are not mistakes, though they look like hinges, but form a part of the grip on the core to use it again.
Sometimes Neolithic cores were transformed into some sort of 'axes' or adzes, while one side is pointed.
More blade cores from the region are presented at Arbannig Finds Neolithic flint cores

References/ Internet

American Anthropologist Volume 49, Issue 4, Article first published online: 28 Oct. 2009

Haskel J. Greenfield The secundary products revolution, the past, the presence and the future in world Arhcaeology 42 (1) 2010
Hirth, K. & Flenniken J.   Core blade technology in Mesoamarican Prehistory  article in PDF
Pelegrin J.  (2006) Long bladetechnology in the Old World: an experimental approachand some archaeological results, in :  Apel , J. & Knutsson, K[ed.]   Skilled Production and Social Reproduction Aspects of Traditional Stone-Tool Technologies Proceedings of a Symposium in Uppsala, August 20–24, 2003SAU Stone Studies 2 Uppsala 2006
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