Abstract The Salado river basin is the largest one in the Buenos Aires province, with an area near 170,000 km2. This work aims to perform a stratigraphic analysis of the middle sector of this basin to provide information on the paleoenvironmental evolution during the end of the Quaternary. Results indicate that the evolution of this basin occurred largely in water deficit conditions. Different aeolian lithostratigraphic units are recognized and grouped into three units, as follows: La Postrera, Laguna Las Barrancas, and De la Riestra Formations. New lithological, paleontological, and chronological information is provided regarding the fluvial deposits, which allows for a deeper understanding of the paleoenvironmental conditions that prevailed during deposition. The integrated study of all these deposits with an adjusted chronological control suggests a paleoenvironmental model that is directly associated with the climatic conditions that prevailed at the end of the Quaternary.

中文翻译：

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阿根廷布宜诺斯艾利斯省萨拉多河中流域晚更新世-全新世古环境

摘要 萨拉多河流域是布宜诺斯艾利斯省最大的河流流域，面积近17万平方公里。这项工作旨在对该盆地中段进行地层分析，以提供有关第四纪末期古环境演化的信息。结果表明，该盆地的演变主要发生在缺水条件下。识别出不同的风成岩石地层单位并将其分为三个单位，如下所示：La Postrera、Laguna Las Barrancas 和 De la Riestra Formations。提供了有关河流沉积物的新岩性、古生物和年代学信息，有助于更深入地了解沉积期间盛行的古环境条件。