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Stratigraphy and sedimentation of the Lower Inferior Oolite of the Cotswolds

The Lower Inferior Oolite rocks of the Cotswolds are described in terms of a single formation divided into 11 members. Fades and thickness variations indicate the presence of a well-defined sedimentary basin, the Severn Basin, in the Cotswold area during Lower Inferior Oolite times. This basin contained a complex sequence of shallow-water carbonate facies including oolite shoal, protected lagoonal and open shelf sand. It was bounded to the west by the Malvern Swell and to the east by the Vale of Moreton Swell, and contains minor structural features which possess similar north–south trends. The Malvern and Vale of Moreton Swells were a major influence on Lower Inferior Oolite sedimentation and are marked by rapid thinning of the succession. Facies belts occur parallel to the trend of these structural features.