Abstract This paper identifies and discusses the major phases of relief evolution resulting from fluvial processes during the Late Quaternary in the Quadrilatero Ferrifero (QF) region (Atlantic Plateau) and contextualises them as strong indicators of the past tectonic and climatic influences on landscape evolution in the Brazilian highlands. Seven regional phases of fluvial level development (terraces and modern floodplains) were identified based on geomorphological and stratigraphic aspects and dated between 83 ka and the present. Although older records occur in some valleys (up to ~140 ka), they are poorly preserved and, therefore, ambiguous in interpretation. River valleys in the QF are generally narrow and deeply dissected, favouring intense erosion processes, thus inhibiting the preservation of Early and Middle Quaternary fluvial archives. Most of the seven phases identified were followed by periods of river downcutting into bedrock. However, river incision rates vary significantly and indicate that the Paraopeba River catchment belongs to a more active tectonic block. There was an association of the regional phases with climatic oscillations that may have influenced the rhythms of the fluvial incision. Driest/coldest periods were marked by the formation of fluvial depositional successions with duricrusts. Repeated formation of terraces with conglomeratic duricrusts may be related to lower rates of river incision in some valleys. Some other factors, such as the existence of knickpoints, the size of each river catchment and its position in the regional river system (trunk river or tributary), as well as in the regional tectonic arrangement, may have influenced the capacity of the rivers to respond differently to the same climatic and tectonic regional events.

中文翻译：

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大西洋高原（巴西高地）第四纪晚期景观演化：河流档案的构造和气候影响

摘要 本文确定并讨论了 Quadrilatero Ferrifero (QF) 地区（大西洋高原）晚第四纪河流过程导致的主要地形演化阶段，并将其作为过去构造和气候对地貌演化影响的有力指标。巴西高原。根据地貌和地层方面确定了 83 ka 至今的河流水平发展的七个区域阶段（梯田和现代洪泛平原）。尽管在一些山谷中出现了较旧的记录（高达约 140 ka），但它们保存得很差，因此解释不明确。QF 中的河谷通常狭窄且深切，有利于强烈的侵蚀过程，从而抑制了早第四纪和中第四纪河流档案的保存。确定的七个阶段中的大部分之后是河流下切进入基岩的时期。然而，河流切入率差异很大，表明 Paraopeba 河流域属于更活跃的构造块。区域阶段与可能影响河流切口节律的气候振荡有关。最干燥/最冷时期的特点是形成了带有 duricrust 的河流沉积序列。具有砾质硬壳层的阶地的重复形成可能与某些山谷中河流切割率较低有关。其他一些因素，如断点的存在、各河流流域的大小及其在区域河流系统（干流或支流）中的位置，以及区域构造布置中，