Article: Review of the stratigraphy of the Wenlock Series in the Welsh Borderland and South Wales

The stratigraphy and correlation of the Wenlock Series (Silurian) in its type area of the Welsh Borderland and also in South Wales are reviewed in the light of new faunal information. Two correlation charts are presented to relate the various lithostratigraphical sequences to one another and to the standard graptolite zones. The Wenlock Limestone is shown to be diachronous from the lundgreni to the ludensis Zone between Dudley and Ludlow. Palaeo-geographical maps are constructed for early and late Wenlock times.