Distribution of depressions and ridges in artifact surfaces, calculated from the classification of models TPI 0.5 mm and TPI 1 mm (S6 Fig.).

<p>Distribution of depressions and ridges in artifact surfaces, calculated from the classification of models TPI 0.5 mm and TPI 1 mm (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0121613#pone.0121613.s006" target="_blank">S6 Fig</a>.).