A detailed account of the geology shown on the complementary 1: 50 000 (or earlier 1: 63 360) geological map(s)

The Cadair Idris district lies at the southern edge of the Snowdonia National Park and, from the high ridges of the Cadair Idris massif to the tidal reaches of

This second edition of 'The Geology of England and Wales' is considerably expanded from its predecessor, reflecting the increase in our knowledge of the region,

A brief explanation of the geology shown on the relevant 1: 50 000 scale geological map(s).