45,610-52,160 years of site and landscape occupation at Nawarla Gabarnmang, Arnhem Land plateau (northern Australia)
45,610-52,160 years of site and landscape occupation at Nawarla Gabarnmang, Arnhem Land plateau (northern Australia)
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DOI：
10.1016/j.quascirev.2019.04.027
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发表时间：
2019-07-01
影响因子：
4
通讯作者：
Castets, Geraldine
中科院分区：
文献类型：
--
作者：
David, Bruno;Delannoy, Jean-Jacques;Castets, Geraldine
我们提出了贝叶斯建模的放射性碳年龄从Nawarla Gabarnmang，中央阿纳姆地高原，北方澳大利亚的考古遗址长序列。一层风载沉积物，含有片状石制品和木炭，始于> 45，610 cal BP（模拟边界年龄范围的年轻端，超出校准曲线的界限），模拟年龄中位数为48，500 cal BP，标志着整个景观中细砂和粉砂的风成活动开始，在遗址内的再沉积与人类的第一次证据同步。这个最早的文化层位（地层单元4）包含509件石器，并以同期沉积间断为标志，从下面的文化贫瘠沉积物（由崩解的屋顶坠落和原位砂岩和石英岩组成）到上覆的文化丰富的风吹砂。新的放射性碳年龄和风吹沉积物一起提供了证据，开始在阿纳姆地高原上明显的景观燃烧c。48,500 cal BP，这表明在阿纳姆地高原的高峰期，大约10,000 - 15,000年后，在Madjedbebe洪泛平原上90公里以北的最低密度的人工制品带（第2阶段）的景观管理实践的强化。这些结果对澳大利亚人口分布的结构和时间以及萨胡尔巨型动物的灭绝产生了影响。(C)2019爱思唯尔有限公司版权所有。
We present Bayesian modelling on a long sequence of radiocarbon ages from the archaeological site of Nawarla Gabarnmang, central Arnhem Land plateau, northern Australia. A horizon of wind-borne sediments containing flaked stone artefacts and charcoal commencing >45,610 cal BP (the young end of the modelled boundary age range, which extends beyond the limit of the calibration curve), with a median modelled age of 48,500 cal BP, signals the onset of aeolian mobilisation of fine sands and silts across the landscape, and re-deposition within the site at a time synchronous with the first evidence of people. This earliest cultural horizon (Stratigraphic Unit 4) contains 509 stone artefacts, and is marked by a contemporaneous sedimentary break, from underlying culturally sterile sediments consisting of disintegrating roof-fall and in situ sandstone and quartzite to overlying culturally-rich wind-blown sand. The new radiocarbon ages and wind-blown sediments together provide evidence for the commencement of noticeable landscape burning on the Arnhem Land plateau c. 48,500 cal BP, suggesting an intensification of landscape management practices at the summit of the Arnhem Land plateau some 10,000 15,000 years after the lowest dense band of artefacts (Phase 2) at Madjedbebe on the floodplains 90 km to the north. These results have ramifications for the structure and timing of the spread of people across Australia, and the extinction of megafauna in Sahul. (C) 2019 Elsevier Ltd. All rights reserved.