The purpose of this study was to prove the direct correlation of a successions of gravel-clay beds recovered in borehole with the melt-water pulses associated with the sea-level oscillations indicated in the δ¹⁸O record in the time-span preceding the 100-kyr glacial cycles. Aimed at this scope, we provide combined ⁴⁰Ar/³⁹Ar and paleomagnetic constraints to a set of seven aggradational successions recovered from a 120 m deep borehole drilled in the buried Paleo-Tiber delta in Rome (central Italy). The geochronologic constraints enable the correlation of each aggradational succession, characterized by a sudden transition from coarse gravel at the base to sandy clay sediments, with periods of sea-level rise indicated by the δ¹⁸O curve encompassing MIS 37 through MIS 19, from 1250 to 780 ka. This stratigraphy, provides a unique and unprecedented well-dated evidence of glacial/deglacial events, matching the global benthic δ¹⁸O stack during this time frame. Furthermore, this study validates the hypothesis that gravel deposition in the catchment basin and the delta of the main rivers in central Italy is triggered by the melting of glaciers in the Apennines Mountain range. It demonstrates the significant potential of these deglaciation proxies to be used worldwide to unravel the chronology of glacio-eustatic events.

中文翻译：

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冰川融化引发意大利中部河流域的大量砾石沉积，揭示了1250年至780年的冰川消融事件

本研究的目的是证明钻孔中发现的一系列砾石-粘土层与100 年前时间跨度内δ ¹⁸ O记录中显示的海平面振荡相关的融水脉冲之间的直接相关性。-kyr冰川周期。针对这一范围，我们为从罗马（意大利中部）埋藏的古台伯河三角洲钻探的 120 m 深钻孔中恢复的一组七个沉积层序提供了组合⁴⁰ Ar / ³⁹ Ar和古地磁约束。地质年代学约束使得每个加积层序具有相关性，其特征是从底部的粗砾石突然过渡到砂质粘土沉积物，并由包含MIS 37 到 MIS 19 的δ ¹⁸ O曲线指示海平面上升时期，从 1250 年开始至 780 ka。该地层学提供了独特且史无前例的冰期/冰消期事件证据，与该时间范围内的全球海底δ ¹⁸ O堆栈相匹配。此外，这项研究验证了意大利中部流域和主要河流三角洲的砾石沉积是由亚平宁山脉冰川融化引发的假设。它证明了这些冰消代理在全球范围内用于揭示冰川海平面上升事件年表的巨大潜力。