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Journal of Palaeogeography
Fig. 9 | Journal of Palaeogeography

Fig. 9

From: Late Tremadocian (Early Ordovician) reefs on the Yangtze Platform, South China, and their geobiological implications: a synthesis

Fig. 9

Field views and photographs of the lithistid sponge-Calathium reefs in the Huanghuachang section (a, b) and stromatolites in the Liujiachang section (c, d). a Cross-sectional view of the reef, near the boundary (dashed line) between the Fenhsiang Formation and the Hunghuayuan Formation, surrounded by shale; b Top surface of the reef in a, arrows indicate cluster growth of the Calathium; c Dome-shaped stromatolites in the Liujiachang section; d Sketch of panel c showing the outline of the laminae in stromatolites

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