Abstract This study deals with the sedimentological and stratigraphic description of Pleistocene coastal deposits of Formentera Island that show evidence of interference between processes characteristic of alluvial and aeolian environments. Here we analyze the sedimentology and stratigraphy of a Pleistocene succession located at Northeast of Formentera and we constrain its chronology by optically stimulated luminescence (OSL) dating. Main sedimentary facies representing the succession of aeolian, alluvial, marine and coastal environments are described in this study. We conclude that although there were two prevailing environments such as coastal aeolian and alluvial, with different processes and resulting forms, the interaction resulted in deposits that share characteristics of both environments, as well as maintain elements inherited from each environment in terms of sedimentary supply, precipitation, runoff or aeolian transport. These coastal deposits represent a small alluvial apron covering the base of a vertical cliff. Most of the sediment that composes these deposits is marine bioclastic sand which was transported in the form of coastal dunes during periods of low sea level. Our results are a useful indicator of the geomorphological processes and changes that occurred during the Pleistocene, unraveling the environmental evolution and contributing to the growing knowledge on the Western Mediterranean aeolian-alluvial interacting environments.

中文翻译：

---

福门特拉岛（巴利阿里群岛，地中海西部）的 AEOLIAN-ALLUVIAL 相互作用：海岸系统的晚更新世演化

摘要 本研究涉及福门特拉岛更新世沿海沉积物的沉积学和地层描述，这些沉积物显示了冲积和风成环境特征过程之间存在干扰的证据。在这里，我们分析了位于福门特拉岛东北部的更新世系列的沉积学和地层学，并通过光激发光 (OSL) 测年来限制其年代学。本研究描述了代表风成、冲积、海洋和沿海环境演替的主要沉积相。我们得出的结论是，虽然沿海风成和冲积两种主要环境具有不同的过程和结果形式，但相互作用导致沉积物具有两种环境的特征，以及在沉积物供应、降水、径流或风沙输送方面保持从每个环境继承的元素。这些沿海沉积物代表了一个覆盖垂直悬崖底部的小型冲积层。构成这些沉积物的大部分沉积物是海洋生物碎屑砂，在低海平面期间以沿海沙丘的形式运输。我们的结果是更新世期间发生的地貌过程和变化的有用指标，揭示了环境演变并有助于对西地中海风积-冲积相互作用环境的了解不断增加。构成这些沉积物的大部分沉积物是海洋生物碎屑砂，在低海平面期间以沿海沙丘的形式运输。我们的结果是更新世期间发生的地貌过程和变化的有用指标，揭示了环境演变并有助于对西地中海风积-冲积相互作用环境的了解不断增加。构成这些沉积物的大部分沉积物是海洋生物碎屑砂，在低海平面期间以沿海沙丘的形式运输。我们的结果是更新世期间发生的地貌过程和变化的有用指标，揭示了环境演变并有助于对西地中海风积-冲积相互作用环境的了解不断增加。