Hay-on-Wye: Sheet Explanation for BGS 1:50 000 Series Geology Map E197 (Geological Memoirs & Sheet Explanations (England & Wales)) - Tapa dura

This "Sheet Explanation" describes the geology of the picturesque Hay-on-Wye district in the Welsh borderlands, between the southern edge of Radnor Forest and the northeastern margin of the Black Mountains. The district provides transect across the southeast margin of the Lower Palaeozoic Welsh Basin. A summary of the lithological characteristics and deposition environments for each formation is provided. In addition, information on the applied geology for the area is offered - mineral and water resources, engineering ground conditions and geological conservation, all of which are vital considerations for future planning and development.