Pleistocene gravels of the Cotswold sub-edge plain from Mickleton to the Frome Valley

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Abstract
I. Introduction The district with which this paper is concerned is defined by the rivers Avon and Severn on the north and west and by the escarpment of the Cotswolds from Mickleton to the Frome valley on the east. In the north of the area, the low ground or sub-edge plain which lies between the hills and the Avon is broken by Bredon Hill. This hill is an outlier of the Cotswolds capped by Inferior Oolite and separated from the main escarpment by a broad vale of Lower Lias clay some six miles wide in the north, between Ashton under Hill and Broadway, but narrower towards the southern end, where the outliers of Dumbleton Hill (Middle and Upper Lias) and Oxenton Hill (Middle and Upper Lias with a small capping of Inferior Oolite) occupy some of the space between Bredon Hill and the escarpment. The north and east of this vale is drained northwards by a small stream, the Isbourne, which rises south of Winchcomb and joins the Avon at Evesham. The Carrant and Tirle brooks drain the south-west part of the vale on the south side of Bredon Hill and join the Avon near Tewkesbury. South of Tewkesbury, the sub-edge plain varies from about three to seven miles in breadth and is broken by the Upper and Middle Lias outliers of Churchdown Hill and Robin's Wood Hill. Numerous small streams drain from the Cotswolds to the Severn, the largest being the river Frome, which flows through Stroud to join

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