Abstract A taphonomic comparison among ten Quaternary tank deposits bearing megafauna remains in northeastern Brazil allowed the identification of four regional-scale taphonomic aspects controlled by climate seasonality: differential preservation of mega-mammal bones, poor physical integrity, spatial resolution (local) and time averaging (104 years). Sedimentary aspects, such as the high degree of packing of fossiliferous layer, indicate conditions of low clastic detrital sediment input in arid conditions. The correlation among geochronological data of tank deposits and paleoclimatic curves of northeastern Brazil suggest that the climate was arid/semi-arid characterized by seasonality between dry and rainy periods. Thus, we postulate the succession of the two paleoenvironmental and paleoecological scenarios during the Late Quaternary affectiing the formation of fossiliferous tank deposits: (i) the intensity and duration of arid periods led animals to search for water and food, and consequently, concentration and death near these water sources; and (ii) in the rainy season, carcasses, disarticulated and fragmented bones around these water sources were transported and accumulated through high-energy tractive flows, reworking previously buried skeletal material.

中文翻译：

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巴西东北部第四系储罐矿床成因及埋藏偏向

摘要 巴西东北部 10 个带有巨型动物群遗骸的第四纪水池沉积物的埋藏学比较可以确定受气候季节性控制的四个区域尺度的埋藏学方面：巨型哺乳动物骨骼的差异保存、物理完整性差、空间分辨率（局部）和时间平均（104 年）。沉积方面，如化石层的高度堆积，表明在干旱条件下碎屑碎屑沉积物输入量低。储罐沉积年代学数据与巴西东北部古气候曲线之间的相关性表明，气候属于干旱/半干旱气候，具有旱季和雨季之间的季节性。因此，我们假设在第四纪晚期影响化石储罐形成的两种古环境和古生态情景的连续性：（i）干旱时期的强度和持续时间导致动物寻找水和食物，因此，在这些地区附近集中和死亡水源；(ii) 在雨季，这些水源周围的尸体、脱节和破碎的骨头通过高能牵引流运输和积累，重新加工以前埋藏的骨骼材料。