The Cambrian rocks described in this paper lie north of the River Severn between the Wrekin Fault, that runs along the north-west flank of the Wrekin, and the Church Stretton Fault which passes west of Charlton Hill (map, PI. 38). A few exposures on the south-east side of the Wrekin are also mentioned. The area is bounded on the north in part by the outcrop of the Rushton Schist and in part by the Uriconian rocks of Charlton Hill to the south of which a small inlier of these older rocks forms the minor elevation of Brom Hill and is entirely surrounded by the Cambrian beds. The south-eastern part of the area is covered by the Coal Measures of the small coalfield of Dryton, south-east of which we also note the occurrence of an Upper Cambrian (
Ctenopyge
) fauna in Dryton Brook.
VIII. The Cambrian area of Rushton (Shropshire)
