Microbially induced sedimentary structures (MISS) allow re-assessing late Holocene lake level fluctuations in Lago Cardiel, Southern Patagonia (Argentina) – Geomorphological and archeological implications

IF 1.9 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International Pub Date : 2025-04-27 DOI:10.1016/j.quaint.2025.109802

Luis R. Horta , Micaela Della Vedova , Rafael Goñi , Juan M. Dellepiane , Daniel Ariztegui , Patricio G. Villafañe

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引用次数: 0

Abstract

Lake-level fluctuations in closed basins provide valuable insights into past climates across multiple temporal scales. Microbially induced sedimentary structures (MISS) contribute significantly to high-resolution paleoenvironmental reconstructions. Lago Cardiel, a key site for paleoenvironmental studies in Patagonia, has been extensively studied since the late 1980s. This study refines late Holocene lake-level fluctuations using a multiproxy approach, including stratigraphic, paleontological, and archaeological data within a robust chronological framework.

For the first time, MISS have been identified as a result of recent lake-level drops. Four MISS levels (L1–L4) were documented in a northern bay near the archaeological site Patito Destapado, at elevations of 288–295 m a.s.l., interbedded with sand and gravel. Gastropods (Lymnaeidae and Chilinidae) from levels L1 and L3 were radiocarbon-dated to 2087 ± 21 and 3327 ± 26 years BP, respectively. L2 (289 m a.s.l.) corresponds to the PD site, dated to 3015 ± 31–3436 ± 35 years BP.

These findings link archaeological site reoccupations with recurrent low lake levels during the Late Holocene. The presence of MISS marks extended low-water periods, which created more accessible landscapes for human activity and settlement.

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微生物诱发的沉积构造（MISS）允许重新评估南巴塔哥尼亚（阿根廷）Lago Cardiel的全新世湖泊水位波动-地貌和考古意义

封闭盆地的湖泊水位波动提供了跨多个时间尺度对过去气候的宝贵见解。微生物沉积构造（MISS）对高分辨率古环境重建具有重要意义。卡迪尔湖是巴塔哥尼亚古环境研究的一个重要地点，自20世纪80年代末以来，人们对它进行了广泛的研究。本研究使用多代理方法，包括地层、古生物学和考古数据，在一个可靠的时间框架内，改进了全新世晚期的湖泊水位波动。这是第一次，MISS被确定为最近湖泊水位下降的结果。在考古遗址Patito Destapado附近的北部海湾记录了四个MISS水平（L1-L4），海拔288-295米，与沙子和砾石互层。L1和L3层腹足类动物的放射性碳年代分别为2087±21和3327±26年BP。L2 （289 m a.s.l）对应于PD遗址，年代为3015±31-3436±35年BP。这些发现将考古遗址的重新占领与晚全新世期间反复出现的低湖泊水位联系起来。MISS的存在标志着低潮期的延长，这为人类活动和定居创造了更容易接近的景观。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quaternary International 地学-地球科学综合

CiteScore

5.60

自引率

4.50%

发文量

336

审稿时长

3 months

期刊介绍： Quaternary International is the official journal of the International Union for Quaternary Research. The objectives are to publish a high quality scientific journal under the auspices of the premier Quaternary association that reflects the interdisciplinary nature of INQUA and records recent advances in Quaternary science that appeal to a wide audience. This series will encompass all the full spectrum of the physical and natural sciences that are commonly employed in solving Quaternary problems. The policy is to publish peer refereed collected research papers from symposia, workshops and meetings sponsored by INQUA. In addition, other organizations may request publication of their collected works pertaining to the Quaternary.