The structure and stratigraphy of part of the Pre-Cambrian outcrop between Church Stretton and Linley, Shropshire

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Abstract
Summary: The use of top and bottom criteria combined with cleavage has shown that the succession is normal for the lower groups of the Longmyndian. The presence of a major overstep of the Mintonian (Portway Group) on to the Synalds Group in Deadmans Batch, with the complete elimination ofthe intervening Lightspout Group, suggests an unconformity at the base of the Mintonian. The eastward creep of the Bayston Group at the expense of the Mintonian when traced from north to south of the area, together with a variation in the dip and strike between these subdivisions, points to another, and possible greater, unconformity above the Mintonian. Although dipping to the west, top and bottom structures show the western half of the Bridges Group and the Oakswood Group to be inverted. This implies a major synclinal structure in the Wentnorian, as the eastern half of the Bridges Group and the Bayston Group have a normal succession. The Uriconian to the west has an inverted and unconformable relationship with the Wentnorian, the unconformities having combined to eliminate the Strettonian and Mintonian.