SUMMARY Fresh information on the ecology, sedimentology and structure of the Lower Silurian (Llandovery) Purple Shale of Shropshire has emerged as a result of large-scale excavations. The griestoniensis Zone is proved, and correlated by shelly fossils with the C5 substage of the type Llandovery area. Current directions indicate a source area up-slope to the south-east. Most of the fauna constitutes a Clorinda community, but towards the top of the sequence a Clorinda/Stricklandia mixture is developed.
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Cocks et al. (1968) studied this question.
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