These maps give whole-country coverage for the United Kingdom on a variety of geological themes; many
maps also cover the continental shelf areas around the British Isles.
Solid Geology maps show the ‘bedrock’ geology of the UK in which geological strata are indicated by different colours. Quaternary Geology maps show the superfical deposits – commonly termed ‘drift’ deposits. ‘Solid’ (bedrock) geology is not normally shown on maps for offshore areas.