12,000 years away from the sea: Long-term circulation of Pacific shells in the Semiarid North of Chile (South America)

IF 3.2 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL
Daniel Hernández Castillo , Andrés Troncoso , César Méndez , Daniel Pascual , Felipe Armstrong , Amalia Nuevo-Delaunay , Sebastián Grasset , Isidora Pérez , Francisca Vera , Manuela Delgado , Antonia Escudero , Mariela Pino , Pablo Larach
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引用次数: 0

Abstract

Marine resources provide a baseline for understanding the sociohistorical trajectories of Andean societies using Pacific coastal environments. This study examines seashell distributions in northern Chile's semiarid region, revealing inland circulation patterns established over twelve thousand years. This included an extensive review of published information and new data assessed through GIS and least-cost paths. Sorting 950 specimens from 32 sites into 32 taxa, we identified consistent mobility patterns across time periods. In addition to the primary west-east trajectory from the sea to the interior, a secondary north-south inland vector was in use since the early Holocene. This study also revealed intensified shell transport during the middle Holocene, and a shift toward down-the-line exchange with reduced shell frequency at interior sites by the late Holocene, particularly in the Limarí Valley. Additionally, shell artifacts - ornaments and tools - were found more consistently in interior contexts. Together, these findings shed light on long-term human adaptation strategies in semiarid mountainous environments.
远离海洋12000年:智利北部半干旱地区太平洋贝壳的长期环流(南美洲)
海洋资源为了解安第斯社会利用太平洋沿岸环境的社会历史轨迹提供了基线。这项研究考察了智利北部半干旱地区的贝壳分布,揭示了12000多年来建立的内陆环流模式。这包括广泛审查通过地理信息系统和最低成本路径评估的已发表信息和新数据。我们将32个地点的950个标本分为32个分类群,确定了不同时期一致的迁移模式。自全新世早期以来,除了从海洋到内陆的主要西-东轨迹外,还使用了次级的南北内陆矢量。该研究还揭示了全新世中期贝壳运输加剧,到全新世晚期,在内陆地区,特别是Limarí山谷,贝壳交换频率下降。此外,贝壳制品——装饰品和工具——在室内环境中被发现的频率更高。总之,这些发现揭示了人类在半干旱山区环境中的长期适应策略。
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来源期刊
Quaternary Science Reviews
Quaternary Science Reviews 地学-地球科学综合
CiteScore
7.50
自引率
15.00%
发文量
388
审稿时长
3 months
期刊介绍: Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.
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