Abstract

The Wenlock Limestone contains a series of small bioherms which earlier workers believed to be analogous with coral reefs. This interpretation is questioned because an adequate framework is absent. An alternative model is proposed: dense clumps of crinoids colonized preferential sites on the sea floor and trapped suspended lime mud as do the sea grasses of modern carbonate-bank environments. The corals and stromatoporoids present are believed to have played a minor role in the formation of the bioherms.

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