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Re-examining the age of the Affad MSA deposits in the Middle Nile Valley
Archaeometry ( IF 1.6 ) Pub Date : 2021-02-25 , DOI: 10.1111/arcm.12670
P. Osypiński 1 , S. Burrough 2 , A. Skinner 3 , K. Standzikowski 4
Affiliation  

We present data on the chronology of fluvial and aeolian sediments as well as ecofacts that allow us to indicate the timing of Middle Stone Age settlement in Affad on the Middle Nile. Previously published chronometric data based solely on (multi-grain) optically stimulated luminescence (OSL) dates suggested the extremely late settlement and usage of Middle Stone Age technology in North-East Africa during the Terminal Pleistocene (post-Last Glacial Maximum). The current analyses using multiple dating methods—multi- and single-grain OSL, thermoluminescence (TL), electron spin resonance (ESR) or accelerator mass spectrometry radiocarbon (AMS14C)—with OSL analyses carried out blind in three independent laboratories suggest this age is incorrect. More likely is that the site dates to about 50 ka. The comparison of dating results and methodological differences enable us to explore a spectrum of possible explanations. Here we infer the strong need to consider an appropriate methodology specific to the depositional context for indicating the age of fluvial sediments and prehistoric settlements at open-air sites of North-East Africa.

中文翻译:

重新审视尼罗河中游 Affad MSA 矿床的年代

我们提供了关于河流和风成沉积物的年代学数据以及生态事实,这些数据使我们能够指出中尼罗河上阿法德的中石器时代定居时间。先前发布的仅基于(多晶粒)光激发光 (OSL) 日期的计时数据表明,在末次更新世(末次盛冰期后),中石器时代技术在东北非的定居和使用极晚。当前使用多种测年方法进行分析——多和单晶粒 OSL、热释光 (TL)、电子自旋共振 (ESR) 或加速器质谱放射性碳 (AMS 14C)——在三个独立实验室进行的 OSL 分析表明这个年龄是不正确的。更有可能的是,该站点的历史可以追溯到大约 50 ka。测年结果和方法差异的比较使我们能够探索一系列可能的解释。在这里,我们推断强烈需要考虑特定于沉积背景的适当方法,以指示东北非露天场所的河流沉积物和史前聚落的年龄。
更新日期:2021-02-25
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