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 C 5 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.