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Albian ammonites of the Benguela Basin (Angola): a biostratigraphic framework

机译:本格拉盆地(安哥拉)的阿尔巴am石:生物地层学框架

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摘要

The study of the Albian ammonite fauna of the sedimentary series in the Benguela Basin (Angola) allows a major revision of the biostratigraphy of the south Atlantic area. The new biostratigraphic approach allows the recognition of 17 horizons distributed in 8 subzones correlated with the ammonite zonation of the Tethyan Province. The Lower Albian is characterized by the Douvilleiceras inaequinodum Subzone (including the D. mammillatum aequinodum Horizon). The Middle Albian is represented by the Oxytropidoceras (Mirapelia) buarquianum Subzone (subdivided into O. (M.) buarquianum and O. (M.) sergipense horizons). The Upper Albian is characterized by the Dipoloceras sp. Subzone (defined by the horizon of the same name), M. (Mortoniceras) stoliczkai Subzone (subdivided into M. (M.) stoliczkai and M. (M.) stoliczkai A-B horizons), Hysteroceras choffati Subzone (including the horizon of the same name), Prohysteroceras wordiei Subzone (subdivided into M. (M.) pricei intermedium, M. (M.) angolanum, M. (Deiradoceras) sp. and M. (subgenus ?) rocbai Horizons), Elobiceras conditum Subzone (subdivided into h. angustum, E. conditum and E. raymondi Horizons), and M. (Subschloenbachia) rostratum Subzone (subdivided into M. (S.) rostratum, M. (Angolaites) wintoni and M. (A.) vicina horizons).
机译:对本格拉盆地(安哥拉)沉积系列的阿尔比亚bian石动物群的研究使南大西洋地区的生物地层学有了重大的改变。通过新的生物地层学方法,可以识别分布在8个分区中的17个层位,这些分区与特提斯省的亚铁矿带相关。下阿尔比亚的特征是豆荚杜鹃(Douvilleiceras inaequinodum)子区域(包括乳头D. mammillatum aequinodum Horizo​​n)。阿尔比亚中部的代表是氧化棘皮动物(Mirapelia)buarquianum分区(细分为O.(M.)buarquianum和O.(M.)sergipense地层)。上阿尔本的特征是Dipoloceras sp.。分区(由同名地平线定义),M。(Mortoniceras)stoliczkai分区(分为M.(M.)stoliczkai和M.(M.)stoliczkai AB地平线),Hysteroceras choffati分区(包括同名),Prohysteroceras wordiei Subzone(细分为M.(M.)pricei intermedium,M.(M.)angolanum,M.(Deiradoceras)sp。和M.(subgenus?)rocbai Horizo​​ns),Elobiceras conditum Subzone(细分为分为h。angustum,E。conditum和E. raymondi Horizo​​ns)和M.(Subschloenbachia)地层子分区(细分为M.(S.)rostratum,M。(Angolaites)wintoni和M.(A.)vicina Horizo​​ns) 。

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