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首页> 外文期刊>Facies >Composition and spatial distribution of microencrusters and microbial crusts in upper Jurassic-lowermost Cretaceous reef limestone (Torinosu Limestone, southwest Japan)
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Composition and spatial distribution of microencrusters and microbial crusts in upper Jurassic-lowermost Cretaceous reef limestone (Torinosu Limestone, southwest Japan)

机译：侏罗纪上-最下白垩统珊瑚礁石灰岩中微壳和微生物壳的组成和空间分布（日本西南部都灵野石灰岩）

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摘要

Tethyan microencrusters and microbial crusts, most of them previously unknown in Japanese Mesozoic biotas, are present in the uppermost Jurassic-lowermost Cretaceous Torinosu Limestone distributed in southwestern Japan. They construct reefal facies together with reef-forming metazoans. Bacinella irregularis and Lithocodium aggregatum are quantitatively most important, while subordinate constituents include Thaumatoporella parvovesiculifera, Koskinobullina socialis, Iberopora bodeuri, Girvanella sp. and "Tubiphytes" morronensis. They are especially common in the shallow-water reefal facies, but appear micritic in outcrops. Microencrusters and microbial crusts can only be recognized in thin sections, and they grow around the reef building metazoans and form bindstone. Each microencruster exhibits some specific spatial distribution associated with its paleoecology. Similarities with the taxonomic composition of the upper Jurassic Tethyan microencruster association imply that the community extended geographically at least to the Tethyan gateway where the Japanese Island Arc was located.
机译：在日本西南部分布的最侏罗纪至最下白垩纪都灵Torinosu石灰岩中，存在特提斯型微壳和微生物壳，其中大多数以前在日本中生代生物群中未知。他们与形成礁的后生动物一起构造了礁相。数量上最重要的是不规则芽孢杆菌和聚集石藻，次要成分包括小球藻，小球菌，博德伊贝菌，小球藻。和“ Tubiphytes” morronensis。它们在浅水珊瑚礁相中尤为常见，但在露头中却是微粉的。微薄壳和微生物硬壳只能在很薄的部分被识别出来，它们在礁石建造的后生动物周围生长并形成结石。每个微壳都表现出与其古生态相关的特定空间分布。与上侏罗纪特提斯人微壳匠协会的分类学组成相似，这意味着该社区至少在地理上扩展到了日本岛弧所在的特提斯人居。

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