Heat treatment of Pennsylvania jasper

IF 0.7 4区历史学 0 ARCHAEOLOGY NORTH AMERICAN ARCHAEOLOGIST Pub Date : 2017-04-01 DOI:10.1177/0197693116682082

C. Dillian

引用次数: 2

Abstract

Heat treatment of silicate toolstone was performed prehistorically, which we assume was to improve characteristics desired in flintknapping, such as increased brittleness and more predictable and controlled conchoidal fracture. However, despite research into heat treatment spanning 50 years, the mechanisms by which stone was improved, and the reasons why people did it, remain unclear. In this study, experiments were designed to test two potential outcomes of heat treatment for Pennsylvania jasper. First, does heating reduce the disruptive effect of macroscopic impurities and flaws on controlled flaking? Second, does heating increase the stone’s brittleness as suggested by Crabtree and Butler in 1964? Such physical alterations would improve the quality of lithic material but may not always occur in high quality stone. The results of these experiments are used to hypothesize the expected heat treatment outcomes sought after by prehistoric flintknappers.

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热处理宾夕法尼亚碧玉

硅酸盐工具石的热处理是在史前进行的，我们认为这是为了改善打石所需的特性，例如增加脆性和更可预测和控制的贝壳状断裂。然而，尽管对热处理的研究已经持续了50年，但改善石头的机制以及人们这样做的原因仍不清楚。在这项研究中，设计了实验，以测试两种可能的结果，热处理宾夕法尼亚碧玉。首先，加热是否会降低宏观杂质和缺陷对受控剥落的破坏性影响?第二，加热会像克拉布特里和巴特勒在1964年提出的那样增加石头的脆性吗?这种物理变化会改善石质材料的质量，但并不总是发生在高质量的石头上。这些实验的结果被用来假设史前燧石猎人所追求的预期热处理结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

NORTH AMERICAN ARCHAEOLOGIST ARCHAEOLOGY-

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： Published quarterly, this is the only general journal dedicated solely to North America—with total coverage of archaeological activity in the United States, Canada, and Northern Mexico (excluding Mesoamerica). The North American Archaeologist surveys all aspects of prehistoric and historic archaeology within an evolutionary perspective, from Paleo-Indian studies to industrial sites. It accents the results of Resource Management and Contract Archaeology, the newest growth areas in archaeology, often neglected in other publications. The Journal regularly and reliably publishes work based on activities in state, provincial and local archaeological societies.

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