The multi-proxy sediment provenance analysis of two sedimentary successions (GER1 core, 130 m long, and CB core, 103 m long) provides new data for detecting the temporal and spatial variations in fluvial drainage patterns and landscape evolution of the Venetian Plain (NE Italy) in relation to Middle–Late Pleistocene climate fluctuations. Detailed petrographic analyses, compared to present-day river signatures, highlight compositional variations of the sediments, providing crucial information for detecting the depositional histories of the two sites, which lie about 15 km apart, and considering a source-to-sink multi-source context. The successions span from a cold phase older than MIS 9/11 to MIS 1, and are chronostratigraphically well correlated from the MIS 7.3 marine transgression. Despite belonging to the same alluvial system since the Last Glacial Maximum, the GER1 and CB cores show different depositional histories during previous Marine Isotopic Stages, starting at least from MIS 8 (i.e., ca 300–250 ka). A glacial interval older than MIS 9/11, is encountered only within records of the GER1 core. Due to its composition and the particularly coarse grain size, it represents a key element for detecting the depositional dynamics of megafans during past climate oscillations. Conversely, the presence of sediments not fully ascribable to any of the present-day catchment suggests the existence of a trunk paleo-river, longitudinal to the foreland axis, flowing from west to east along the Po Plain and occasionally draining the Venetian Plain. A causal relationship between prograding mechanisms of transverse alluvial megafans and Pleistocene climate variations is detected, taking into account responses of local alluvial systems to glaciers' development, sediment yield from the orogenic hinterland, and sea-level lowstands and highstands. A focus on glacial termination phases allows identification of two additional incised valleys, established at the end of the pre-MIS 9/11 glaciation and of MIS 6.

两个沉积序列（GER1 岩心，130 m 长，CB 岩心，103 m 长）的多代理沉积物源分析为检测威尼斯平原（NE）河流排水模式和景观演变的时空变化提供了新数据。意大利）与中晚更新世气候波动的关系。与当今河流特征相比，详细的岩相分析突出了沉积物的成分变化，为检测相距约 15 公里的两个地点的沉积历史提供了重要信息，并考虑了源到汇的多源语境。这些序列从早于 MIS 9/11 到 MIS 1 的冷相跨越，并且在年代地层学上与 MIS 7.3 海侵具有很好的相关性。尽管自末次盛冰期以来属于同一冲积系统，但 GER1 和 CB 核心在之前的海洋同位素阶段显示出不同的沉积历史，至少从 MIS 8 开始（即约 300-250 ka）。比 MIS 9/11 更早的冰川间隔仅在 GER1 核心的记录中出现。由于其成分和特别粗的粒度，它代表了在过去气候振荡期间检测巨型风扇沉积动态的关键因素。相反，不能完全归因于当今任何集水区的沉积物的存在表明存在一条与前陆轴线纵向的古干河，沿着波平原从西向东流动，偶尔会排干威尼斯平原。考虑到当地冲积系统对冰川发育、造山腹地沉积物产量以及海平面低位和高位的响应，检测到横向冲积巨型扇的进积机制与更新世气候变化之间的因果关系。对冰川终止阶段的关注允许识别在 MIS 9/11 前冰川和 MIS 6 结束时建立的另外两个切割谷。