首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >New data on the palaeontology and sedimentology of the Lower Jurassic Lisbon Formation (Karoo Supergroup), Ellisras Basin, South Africa
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New data on the palaeontology and sedimentology of the Lower Jurassic Lisbon Formation (Karoo Supergroup), Ellisras Basin, South Africa

机译:南非埃利斯拉斯盆地下侏罗世里斯本组(卡鲁超群)古生物学和沉积学的新数据

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摘要

Published records on the palaeontology of the Lower Jurassic Lisbon Formation in the Ellisras Basin (a South African continuation of the Botswana Kalahari Karoo Basin) are virtually non-existent. Here we review the geology of this extremely poorly exposed unit, and describe a newly discovered ichnofossil and fossil vertebrate association, consisting of constructed structures resembling termitaria as well as of basal sauropodomorph remains. Our paleontological and sedimentological analyses permit a direct bio- and lithostratigraphic correlation of the Lisbon Formation at farm Lisbon with the upper part of the Elliot Formation in the main Karoo Basin as well as other Lower Jurassic continental red bed successions throughout southern Africa. We tentatively suggest that the formation (especially its upper part) was deposited in a dryland setting with well-drained soils that at least episodically supported some flora and a fauna probably dominated by basal sauropodomorphs.
机译:埃利斯拉斯盆地(博茨瓦纳卡拉哈里喀鲁盆地的南非延续)下侏罗纪里斯本组古生物学的已出版记录几乎不存在。在这里,我们回顾了这个极度裸露的单元的地质情况,并描述了一个新发现的鱼类化石和化石脊椎动物协会,该协会包括类似于白蚁的人工构造以及基底蜥脚类恐龙的遗迹。我们的古生物学和沉积学分析使里斯本农场的里斯本组与主要的卡鲁盆地埃利奥特组的上部以及整个非洲南部的其他下侏罗纪大陆红层演替具有直接的生物和岩石地层学联系。我们初步建议,该地层(尤其是其上部)沉积在一个排水良好的旱地环境中,至少在土壤上支持了一些可能由基底蜥脚类动物为主的动植物。

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