This article deals with geomorphological, sedimentary, paleopedological, chronological and archaeological records within a segment of the Jacaré-Guaçu River alluvial plain in southeast Brazil, aiming to evaluate the influence of climatic and hydrological changes on the landscape transformations. The data set, including geomorphological mapping, macroscopic and microscopic descriptions of soils over sedimentary deposits, spatial distribution of archaeological lithic artifacts and OSL dating, permitted the construction of an landscape evolutional model to the past 115,000 years. The results show multiple alternations between humid and drier climates that contribute to the formation of sandy and gravel deposits, accounting for seven paleosurfaces and five paleosols linked to different drainage conditions. The artifacts records of Amerindian settlements since the Pleistocene–Holocene transition contributed to the demarcation of paleosurfaces that formed concurrently with landscape and river level changes. The density of human activities was found to vary simultaneously with environmental transformations in the area. A series of hydrological changes alternating between the formation of ephemeral torrential channels formed under the influence of drier climates and predominance of grassland vegetation and perennial meandering channels of different dimensions formed with the contribution of the increase of florestal associations and rise in water table were also documented, mixed with alternations between fluvial aggradation (<7 m), incision (<8.5 m), and avulsion (<600 m). Such changes in the landscape contributed to the establishment of lower terraces with older (115–111 ka) deposits and paleosols linked to good drainage conditions and higher terraces with newer (12.4–8 ka) deposits and paleosols linked to poor drainage conditions, constituting a pattern of combinations between landforms and associated materials different from that previously registered in the alluvial plains of southeast Brazil.

本文涉及巴西东南部 Jacaré-Guaçu 河冲积平原一段内的地貌、沉积、古土壤学、年代学和考古学记录，旨在评估气候和水文变化对景观转变的影响。该数据集包括地貌图、沉积物上土壤的宏观和微观描述、考古石器文物的空间分布和 OSL 年代测定，允许构建过去 115,000 年的景观演化模型。结果显示潮湿和干燥气候之间的多重交替导致沙质和砾石沉积物的形成，占与不同排水条件相关的七个古地表和五个古土壤。自更新世-全新世过渡以来美洲印第安人定居点的文物记录有助于划定与景观和河流水位变化同时形成的古地表。发现人类活动的密度与该地区的环境变化同时发生变化。一系列的水文变化交替出现在干旱气候影响下形成的短暂洪流与草原植被优势以及随着植物群落增加和地下水位上升形成的不同维度的多年生蜿蜒河道之间的交替。 , 混合河流积聚 (<7 m)、切口 (<8.5 m) 和撕脱 (<600 m) 之间的交替。