Rivers with little to no influence of vegetation and their implications for the architecture of Early Paleozoic and Precambrian fluvial deposits are an important topic of investigation for both clastic sedimentology and Earth System evolution perspectives. Despite the long‐held concept of a dominant style of wide, shallow sheet‐braided sandy channels, growing evidence for a great variability of architectural elements in pre‐vegetation settings point to the predictable occurrence of other fluvial styles, which are possibly related to areas of low‐slope alluvial plains. The present work brings sedimentological descriptions and fluvial style interpretations of Silurian fluvial successions of the Serra Grande Group in northeastern Brazil, developed in a glaciated basin margin (therefore with little to no effect of vegetation). The comparison of the resulting channel body architectures integrated to paleocurrent data and a diffusion‐based numerical model enabled the evaluation of the controls on fluvial architecture variability in unvegetated alluvial plains.

中文翻译：

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植被较差的地球上河流构造的可变性：巴西东北部志留纪层状辫状和曲折的祖先河沉积物

对于碎屑沉积学和地球系统演化的观点，几乎没有植被影响的河流及其对早期古生代和前寒武纪河流沉积物的构造的影响是重要的研究课题。尽管长期以来人们一直认为宽阔的浅层辫状沙质河道占主导地位，但越来越多的证据表明，植被前环境中建筑元素的巨大变异性表明，其他河流形态的可预测性也可能与区域相关低坡冲积平原。本工作带来了巴西东北塞拉格兰德群志留系河系演替的沉积学描述和河系样式解释，该盆地在冰川盆地边缘发育（因此几乎没有植被影响）。