湖北早奥陶世海绵-微生物礁的特征变化(英文)
【摘要】:正The Ordovician saw the Great Ordovician Biodiversification Event and a transition from microbial- to metazoan -dominated reefs.Early Ordovician sponge-microbial reefs,dominated by microbialites and lithistid sponges, are widespread in the Fenghsiang Formation and overlying Hunghuayuan Formation of the Yichang area,Hubei Province,China.Here,we document temporal changes in the composition,mode of construction,and distribution of these reefs.
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