Early recovery of sponge framework reefs after Cambrian archaeocyath extinction: Zhangxia Formation (early Cambrian Series 3), Shandong, North China
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文摘

Lithistid sponges mutually attached and formed reef framework in the middle Cambrian.

Their structure is similar to those of archaeocyath reefs and Early Ordovician reefs.

Lithistid sponge-microbial reefs were widespread throughout the mid-late Cambrian.

Framework-building metazoans recovered within ~ 5 Myr of the archaeocyath reef decline.

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