ABSTRACT

The Rivoli-Avigliana end moraine system (Italian Western Alps) hosts an important stratigraphic archive of Pleistocene glaciations. A new geological map provides a 3D architecture of the system that reveals a complex architecture of glacial, alluvial and lacustrine units. Six glacial units were recognized. During the deposition of the four older glacial units (Early-Middle Pleistocene) the morphology of the valley outlet had a different drainage pattern from the present, with the presence of large lakes. From the penultimate glaciation to the Last Glacial Maximum (LGM) the piedmont lobe was confined within the valley, never extending towards the alluvial Po Plain. The LGM is characterized by two glacial advances and four distinct recessional phases during the Lateglacial. The presence of a bedrock inselberg affected the flow of the glacier front, which should have had weak erosive strength as shown by the preservation of lacustrine deposits below the glacial units.

摘要

里沃利-阿维利亚纳冰碛系统（意大利西部阿尔卑斯山）拥有重要的更新世冰川地层档案。一张新的地质图提供了该系统的 3D 结构，揭示了冰川、冲积和湖泊单元的复杂结构。已识别出六个冰川单元。在四个较旧的冰川单元（早-中更新世）沉积期间，山谷出口的形态与现在不同，存在大型湖泊。从倒数第二次冰期到末次盛冰期 (LGM)，山前叶被限制在山谷内，从未向冲积波平原延伸。LGM 的特点是晚冰期有两次冰川推进和四个不同的衰退阶段。基岩inselberg的存在影响了冰川前缘的流动，