"The Malvern ridge [Herefordshire-Worcestershire border, central England] consists of a series of Pre-Cambrian fault-blocks, which have been thrust upwards into their present positions through an overlying cover of Cambrian, Silurian, and lower Old Red Sandstone sediments. The formation of the narrow, localized belt of folds which lie immediately to the west of the Malverns is the result of the displacement of the Pre-Cambrian basement blocks."

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