The Cueva del Silo is part of the lower karst level of the Cueva Mayor-Cueva del Silo karst system (Sierra de Atapuerca, Burgos, Spain), whose evolution has preserved an impressive archeo-paleoanthropological sequence since the Early Pleistocene. Cueva del Silo is remarkable for the presence of fluvial deposits that record the entry of the Arlanzón River water in the cave system, providing a key sequence to investigate the fluvio-karstic relationships that give rise to this endokarst system. In order to provide a chronological framework to these fluvial deposits, six sediment samples were dated by Electron Spin Resonance and 16 samples by paleomagnetism, collected from two outcrops: Galería de las Arenas and Sala del Caos. Our results provide maximum mean age of around 1600 ka and a minimum age of 916 ± 136 ka for the deposits in Sala del Caos. The younger date from Sala del Caos might represent the last fluvial input from Arlanzón River in the lower karst level. In contrast, ESR ages estimates of 1268 ± 133 ka and 1262 ± 108 ka were obtained for Galería de las Arenas sequence, which could indicate re-sedimentation processes from the intermediate karst level where similar ages were published. The annual dose might be wrongly assessed due to the re-sedimentation processes inside the karst, hence, ESR ages for these facies should be treated with extreme caution.

Cueva del Silo 是 Cueva Mayor-Cueva del Silo 岩溶系统（西班牙布尔戈斯的 Sierra de Atapuerca）低岩溶层的一部分，其演化保留了自更新世早期以来令人印象深刻的考古-古人类学序列。Cueva del Silo 因河流沉积物的存在而引人注目，该沉积物记录了 Arlanzón 河水进入洞穴系统，为研究产生这种内喀斯特系统的河流-岩溶关系提供了关键序列。为了提供这些河流沉积物的年代框架，从两个露头采集的六个沉积物样品通过电子自旋共振和古地磁学确定了 16 个样品的年代：Galeríade las Arenas 和 Sala del Caos。我们的结果为 Sala del Caos 的矿床提供了大约 1600 ka 的最大平均年龄和 916 ± 136 ka 的最小年龄。Sala del Caos 的较年轻日期可能代表了较低喀斯特水平的 Arlanzón 河的最后河流输入。相比之下，Galeríade las Arenas 序列的 ESR 年龄估计值分别为 1268 ± 133 ka 和 1262 ± 108 ka，这可能表明从中级岩溶水平发表了相似年龄的再沉积过程。由于岩溶内部的再沉积过程，年剂量可能被错误地评估，因此，这些相的ESR年龄应该非常谨慎地对待。这可能表明从中级喀斯特水平的再沉积过程，其中发布了相似的年龄。由于岩溶内部的再沉积过程，年剂量可能被错误地评估，因此，这些相的ESR年龄应该非常谨慎地对待。这可能表明从中级喀斯特水平的再沉积过程，其中发布了相似的年龄。由于岩溶内部的再沉积过程，年剂量可能被错误地评估，因此，这些相的ESR年龄应该非常谨慎地对待。