A quantitative assessment of intraspecific morphological variation in Gahagan bifaces from the southern Caddo area and central Texas
A quantitative assessment of intraspecific morphological variation in Gahagan bifaces from the southern Caddo area and central Texas
复制标题
对来自卡多南部地区和德克萨斯州中部的 Gahagan bifaces 种内形态变异的定量评估
作者：
R. Selden;John E. Dockall;Morgane Dubied
摘要本研究聚集了来自南部卡多地区和德克萨斯州中部的完整或重建的Gahagan双面，以测试Gahagan双面形态在不同地区之间存在差异的假设。对Gahagan双面部（n=102）进行扫描，然后使用一种新的地标协议和几何形态测量学工具进行分析。结果提供了一个预览的显着差异，在Gahagan biface形态之间表示南部卡多地区和德克萨斯州中部地区。尺寸差异代表了当前理论结构的反转，该理论结构认为工具尺寸的减小与距原材料源的距离的增加相关联。据推测，对比形态代表两个离散的社区的做法;一个（新兴的卡多园艺家），其中Gahagan bifaces被征召主要是为埋葬和仪式活动，和其他（得克萨斯州中部狩猎采集者），其中Gahagan bifaces被利用在一个较长的时间跨度在更实际和功利的情况。
ABSTRACT This investigation aggregates intact or reconstructed Gahagan bifaces from the southern Caddo area and central Texas to test the hypothesis that Gahagan biface morphology differs between the regions. The Gahagan bifaces (n=102) were scanned, then analyzed using a novel landmarking protocol and the tools of geometric morphometrics. Results provide a preview of the significant differences in Gahagan biface morphology expressed between the southern Caddo area and central Texas regions. The size discrepancy represents an inversion of current theoretical constructs that posit a decrease in tool size thought to articulate with an increase in distance from the raw material source. It is posited that the contrasting morphologies represent two discrete communities of practice; one (emergent Caddo horticulturalists) where Gahagan bifaces were enlisted primarily for burial and ritualistic activities, and the other (central Texas hunter-gatherers) where Gahagan bifaces were utilized over a longer time span in more practical and utilitarian contexts.