ABSTRACT The Quina scraper features an important role in the discussion of European Middle Palaeolithic variability. Explanations for its characteristic retouch and blank morphology have ranged from economic to functional and cultural considerations. One hypothesis is that Quina retouch maintains the edge angle of the retouched margin, allowing the upkeep of high cutting potential despite repeated resharpening. In this study, we examine this hypothesis by using a sample of scrapers from the Middle Palaeolithic site of Roc de Marsal in southwest France. The results show that, when the influence of reduction intensity and flake thickness are controlled, Quina retouch has no detectable impact on the retouched edge angle. Instead, the overall higher edge angles among Quina scrapers are a product of continuous reduction and the use of thicker blanks. We discuss possible factors underlying the occurrence of Quina retouch with respect to lithic economy and function.

中文翻译：

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Quina修饰无法保持缩小的边缘角度

摘要Quina刮板在讨论欧洲中古石器时代的可变性方面具有重要作用。其特征修饰和空白形态的解释涉及经济，功能和文化方面的考虑。一种假设是，Quina修饰可以保持修饰边缘的边缘角度，即使反复重新磨磨，也可以保持高切割潜力。在这项研究中，我们通过使用法国西南部Roc de Marsal中古石器时代遗址的刮刀样本检验了这一假设。结果表明，在控制还原强度和薄片厚度的影响时，Quina修饰对修饰的边缘角度没有可检测到的影响。取而代之的是，Quina刮刀之间总体上较高的边角是连续减小和使用较厚毛坯的产物。