This case study from the renowned Demänová Cave System in the Carpathians of Slovakia demonstrates that the conventional methods of fluvial sedimentology, combined with an allostratigraphic mapping and speleothem U‐series isotopic dating, can give unprecedented insights into the hydrological history of underground karst conduit. The deposits studied are a relic compound sidebar ranging from gravel to mud and encapsulating the conduit’s hydrological history from the middle Pleistocene to the present time. A succession of 10 allostratigraphic units, time‐constrained by speleothems, are recognized in the sidebar deposits, and the corresponding morphodynamics of an evolving cave‐floor sedimentation are reconstructed in considerable detail. The subterranean river water stages recognized from the deposits, time‐constrained by flowstone layers and stalagmites, correlate with and add to the regional record of climate changes. Two distinct episodes of flow ponding (high‐stage slackwater conditions) are recognized and attributed to the independently documented downstream cave‐roof collapses, probably triggered by the Carpathian post‐orogenic earthquakes. This multidisciplinary study may serve as a useful methodological guide for the analysis of fluviokarstic deposits in speleological research and reconstruction of their hosting cave hydrological history.

中文翻译：

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喀斯特溶洞管道内残留河床沉积物的沉积解剖学和水文记录

这项来自斯洛伐克喀尔巴阡山脉著名的Demänová洞穴系统的案例研究表明，常规河床沉积学方法，同化地层制图和Speleothem U系列同位素定年相结合，可以为地下岩溶导管的水文历史提供空前的见识。所研究的沉积物是一个从砾石到泥土的遗迹复合物侧栏，并囊括了从中更新世到目前的导管水文历史。在侧梁沉积物中识别出了连续10个受地衣针时间限制的同质地层单位，并且相当详细地重建了不断演化的洞穴-地面沉积的形态动力学。从矿床中识别出地下河水段，时间受流石层和石笋限制，与气候变化的区域记录相关并增加了区域记录。识别出两种截然不同的流动积水（高阶松弛水情况），并将其归因于独立记录的下游洞穴屋顶塌陷，这可能是喀尔巴阡造山后地震引发的。这项多学科的研究可以作为有用的方法学指南，用于在岩相学研究和重建其溶洞水文历史的过程中分析岩溶岩沉积物。