Mixed carbonate–siliciclastic deposits of the Tamengo Formation (terminal Ediacaran), record the rise of calcifying metazoans and the origin of exoskeletons in animals. To explore the relationships between environmental setting and the first appearance of calcified metazoans and their ecology, this study presents detailed sedimentological and stratigraphic data of eight sections that capture the final stages of the Ediacaran (550 to 543 Ma). This study combines stratigraphic characterization with detailed facies descriptions and evaluates lateral heterogeneity and overall ramp sedimentation integrated with fossil distribution. The Tamengo Formation represents a storm‐dominated ramp. The outer to mid‐ramp is composed of very fine‐grained siliciclastic rocks containing Corumbella body fossils and thin‐bedded mudstone/wackestone containing Cloudina. The mid‐inner ramp is dominated by wackestone/packstone with abundant Cloudina skeletal debris and ooid packstone/grainstone shoal deposits. Locally, fragments of Corumbella and Cloudina are found on the same horizon, which is a result of their high accumulation rate, resulting from the reworking and mixing of epifaunal organisms. In spite of taphonomic biases, the general distribution of Corumbella and Cloudina across the unit suggests that these organisms have been transported across ramp and/or probably show a differential response of fauna preservation. When compared to other occurrences worldwide, this dataset indicates an already complex ecosystem in the Ediacaran, where these early animals were capable of adapting to specific environmental niches.

中文翻译：

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Ediacaran Tamengo组晚期（巴西）的沉积相，化石分布和沉积环境

塔门戈组（埃迪卡拉端）的碳酸盐-硅质碎屑混合沉积物记录了钙化后生动物的崛起和动物骨骼的起源。为了探索环境环境与钙化后生动物的首次出现及其生态之间的关系，本研究提供了捕获Ediacaran最终阶段（550至543 Ma）的八个剖面的详细沉积学和地层数据。这项研究将地层特征与详细的相描述相结合，并评估了横向非均质性和整体斜坡沉积与化石分布的结合。塔门戈组形成了一个以风暴为主的斜坡。外斜坡到中斜坡是由含Corumbella的细粒硅质碎屑岩组成含Cloudina的人体化石和薄层泥岩/砂岩。内斜坡中部以沃克石/堆积岩为主，云顶骨骼残骸丰富，卵石堆积/粒岩浅滩沉积。在当地，Corumbella和Cloudina的碎片被发现在同一水平线上，这是由于表皮生物的重新加工和混合导致它们高积累率的结果。尽管存在拼写偏见，但Corumbella和Cloudina的总体分布跨单位的暗示表明这些生物已跨坡道运输和/或可能表现出对动物保护的不同反应。与世界各地的其他事件进行比较时，该数据集表明埃迪卡拉动物区中已经很复杂的生态系统，这些早期动物能够适应特定的环境生态位。