The Glaciation of Clun Forest, Radnor Forest, and some Adjoining Districts

Abstract
The district described, which comprises the county of Radnor and parts of Montgomeryshire, Shropshire, Brecknockshire, Herefordshire, and Worcestershire, is some 1000 square miles in area, and is included in Sheets 151, 164, 165, 166, 179, 180, 181, 196, 197, and 198 of the 1-inch map of the Ordnance Survey of England & Wales. To be more precise, the area is bounded on the north by the River Severn from Newtown to below Welshpool; on the east by a line from Welshpool by Forden, Chirbury, and Church Stoke, to Craven Arms and Ludlow, thence by Woofferton and Tenbury to the neighbourhood of Bromyard, and so to Hereford; on the south by tho scarp of the Brecon Beacons and the Black Mountains; and on the west by the River Wye from Builth Wells to its junction with the Ithon, thence along that stream to its head, and so northwards to Newtown. The country is somewhat complicated topographically, and the drainage-system has been rendered more intricate by the efforts of ice during the glaciation. The two principal elevated areas within the district are Clun Forest (1666 feet above O.D.) and Radnor Forest (2166 feet O.D.), the former consisting of Ludlow rocks and Old lied Sandstone, and the latter of Wenlock and Ludlow Beds. South-east of Radnor Forest lies a somewhat faulted belt of country consisting of Silurian rocks, in which the escarpments of the Aymestry and Wenlock limestones are prominent features. South and east of the Silurian country lies an extensive area of

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