This report summarises the work carried out during Phase
4 of a contract (PECD 7/1/004) commissioned by the
Department of the Environment for the Welsh Otlice. The
objectives of Phase 4 were to provide an up-to-date
geological base in the form of thematic geology maps as a
guide to planning for future development within the
Bridgend and Llantrisant areas. It follows directly from a
pilot study of the Bridgend area during Phase 1 (Fletcher,
C. J. N., and others, 1982), which developed techniques
and explored the potential of thematic geology maps for
this area
