Abstract Shale samples recovered from the Masetlheng Pan-1 well, drilled in western Botswana, contain abundant, moderately well preserved, and modestly diverse microfossils. The fossils are assigned to eleven taxa, several reported for the first time from Africa. Distinctive acritarch taxa suggest a late Tonian age for the thick siliciclastic succession that lies unconformably beneath sandstones of the upper Ediacaran-lower Cambrian Nama Group. Masetlheng Pan-1 rocks, therefore, record the major events of Damara sedimentation and tectonics, hidden beneath surficial sands of western Botswana.

中文翻译：

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来自博茨瓦纳地下页岩的托尼安微化石

摘要 从在博茨瓦纳西部钻探的 Masetlheng Pan-1 井回收的页岩样品含有丰富、保存完好且种类多样的微化石。这些化石被分配到 11 个分类群，其中有几个是首次从非洲报道。独特的 acritarch 分类群表明，厚硅质碎屑岩层序位于托尼阶晚期，不整合地位于上埃迪卡拉纪-下寒武纪 Nama 群的砂岩之下。因此，Masetlheng Pan-1 岩石记录了隐藏在博茨瓦纳西部地表沙下的达马拉沉积和构造的主要事件。