BGS Geology data is provided as a series of layered themes. Depending on the scale of data chosen, up to five main themes are available.
Artificial ground is where the ground surface has been significantly modified by human activity including quarrying, landscaping, land-raise, cuttings and embankments.
Mass movement deposits are primarily superficial deposits or weathered bedrock that have moved downslope under gravity to form landslips.
Superficial deposits are the youngest geological deposits formed during the most recent period of geological time, the Quaternary. They date from about 2.6 million years ago to the present.
Bedrock geology is the main mass of rocks forming the earth and they are present everywhere, whether exposed at the surface in rocky outcrops or concealed beneath superficial deposits, artificial ground or water.
Linear features are an intrinsic part of the bedrock and superficial themes defining relationships between geological units or landscape features. Linear features are useful additional data that can help you understand the structure and origin of the geological map.
Downloads of sample data (and some datasets) together with a range of information and guidance are available.
Potential uses differ according to map scale, ranging from detailed site-level study (generally 1:10 000 scale), through local and regional generalisations (1:50 000 to 1:250 000 scale), to national overviews (1:625 000).