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Stromatolite and bryozoan build‐ups from the Werra Cycle (Zechstein) of the Southern Permian Basin of Europe meet all definitions given by various authors for reefs and they commonly occur at the shelf edge. In a few places, including western Poland, they are also recorded in the basinal facies. The main part of the reef is formed by fragmented bryozoan zoaria. The reef biota are a typical bryonoderm...
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