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首页> 外文期刊>Facies >Reef-building red algae from an uppermost Permian reef complex as a fossil analogue of modern coralline algal ridges
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Reef-building red algae from an uppermost Permian reef complex as a fossil analogue of modern coralline algal ridges

机译：Reef-Building Red藻类来自最上面的二叠系礁复合体作为现代珊瑚藻脊的化石模拟

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摘要

Calcareous red algae have been important components in reefal facies since the Mesozoic but their volumetric contribution to Palaeozoic reefs was usually low. Here, we report a reef-building community dominated byParachaetetes, a genus of solenoporacean red algae, overgrowing uppermost Permian sponge reefs in Cili (Hunan Province, South China). The fossil assemblage in the community consists of about 88%Parachaetetes, 7% rugose corals, and 5% reef-dwelling organisms, including gastropods, brachiopods, foraminifera andTubiphytes. Although the biodiversity of this community is far lower than that in modern reefs, the association of red algae and rugose corals shares several attributes with the coral-coralline algal communities of modern tropical reefs. Analysis of sedimentary facies indicates that the reef-buildingParachaetetesgrew in a turbulent setting near the margin of a carbonate platform, perhaps in a reef-crest environment known from modern coralgal reefs. Although calcifying red algae have been recorded from the Cambrian onwards, this is the oldest site where crustose red algae played a dominant role in reef construction.
机译：钙质红藻是一种重要的成分，自中生代以来的refal相片，但它们对古生代礁的体积贡献通常很低。在这里，我们报告了一群珊瑚礁建筑群落，由Cili（湖南省湖南省湖南）大约过多的二叠纪海绵珊瑚礁举行ByParachaeTees。群落中的化石组合包括约88％的雕像，7％的rugose珊瑚和5％珊瑚礁居住的生物，包括胃肠杆菌，布拉米鳕，foraminifera andtubiftes。虽然这种社区的生物多样性远低于现代珊瑚礁的生物多样性，但红藻和葡萄糖珊瑚协会与现代热带礁石的珊瑚珊瑚藻类群共享了几个属性。沉积相的分析表明，礁石建于碳酸盐平台边缘附近的湍流设定中的珊瑚礁 - 建筑曲面造成，也许是从现代珊瑚糖礁石已知的珊瑚礁环境中。虽然从寒武纪开始播放钙化红藻类，但这是克鲁塞斯红藻类在珊瑚礁施工中发挥着主导作用的最古老的网站。

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