File:Calculating the Geometric Index of Unifacial Reduction (GIUR).gif

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Calculating_the_Geometric_Index_of_Unifacial_Reduction_(GIUR).gif ‎(500 × 388 pixels, file size: 97 KB, MIME type: image/gif, looped, 13 frames, 17 s)

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English: T = overall artefact thickness

t = height of retouch scar

This diagram shows how to calculate the GIUR of a unifacial lithic artefact as described in Hiscock and Clarkson (2005) [1]. Each measurement is taken at three points along the reduced edge (denoted here by subscript) and t/T ratios are calculated and averaged to produce the artefact's GIUR value. This value increases proportionally to the amount of reduction.
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Author Coolgrandma420

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  1. ↑ Hiscock, P., Clarkson, C., 2005. Experimental evaluation of Kuhn’s geometric index of reduction and the flat-flake problem. J. Arch. Sci. 32, 1015–1022

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current03:49, 16 December 2014Thumbnail for version as of 03:49, 16 December 2014500 × 388 (97 KB)Coolgrandma420 (talk | contribs)adjusting size
03:44, 16 December 2014Thumbnail for version as of 03:44, 16 December 20141,000 × 777 (300 KB)Coolgrandma420 (talk | contribs)adjusting size
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