Fig. 6From: Late Tremadocian (Early Ordovician) reefs on the Yangtze Platform, South China, and their geobiological implications: a synthesisField photos of lithistid sponge-microbial reefs in the Taiping and Huanghuachang sections. a Field view of the Taiping reefs surrounded by bioclastic limestones; b Sketch of panel a showing the outline of the lithistid sponge-microbial reefs; c Details of Huanghuachang reefs showing lithistid sponges (Sp) encrusted by microbes (M); d Microbes (M) encrusting crinoid holdfasts (Cr) in the reefs of Huanghuachang section. The coin diameter = 2 cm; e Field view of the Huanghuachang reefs showing the surrounding bioclastic limestone and shaleBack to article page