Revisiting Alice Boer: Site formation processes and dating issues of a supposedly pre-Clovis site in Southeastern Brazil,Geoarchaeology

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Revisiting Alice Boer: Site formation processes and dating issues of a supposedly pre-Clovis site in Southeastern Brazil
Geoarchaeology ( IF 1.4 ) Pub Date : 2020-12-05 , DOI: 10.1002/gea.21831
Astolfo G. Mello Araujo ₁ , James K. Feathers ₂ , Gelvam A. Hartmann _{3,

4} , Francisco S. B. Ladeira ₃ , Éverton V. Valezio ₃ , Diego L. Nascimento ₃ , Olivia Ricci ₁ , Victor J. Oliveira Marum ₅ , Ricardo I. Ferreira da Trindade ₆

Affiliation

The Alice Boer site, located in Southeastern Brazil, was considered to be one of the oldest sites in the Americas, and a strong candidate for being a pre-Clovis site. Ages obtained by researchers during the 1970s and 1980s put the site inside a chronological range between 2 and 14 ka, eventually reaching as old as 30 ka or even 130 ka. Between 2010 and 2012, our research team revisited the site to improve the knowledge of Paleoindian occupation in Southeastern Brazil. Here, we present new data of stratigraphy and chronology (luminescence and radiocarbon dating), pedological and magnetic analysis performed at some of the sites. Results show that the site's oldest occupation took place ca. 8 ka, which provides new insight into human occupation in South America. In addition, we show some issues with radiocarbon contamination due to soil humin fraction mobility.

中文翻译：

重温爱丽丝波尔：巴西东南部一个所谓的克洛维斯前遗址的遗址形成过程和约会问题

位于巴西东南部的爱丽丝波尔遗址被认为是美洲最古老的遗址之一，也是克洛维斯前遗址的有力候选者。研究人员在 1970 年代和 1980 年代获得的年龄将该地点置于 2 至 14 ka 的年代范围内，最终达到 30 ka 甚至 130 ka 的年龄。2010 年至 2012 年间，我们的研究团队重新访问了该地点，以提高对巴西东南部古印第安人占领的认识。在这里，我们展示了在一些地点进行的地层学和年代学（发光和放射性碳测年）、土壤学和磁性分析的新数据。结果表明，该地点最古老的职业发生在 ca。8 ka，它提供了对南美洲人类职业的新见解。此外，

更新日期：2020-12-05

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