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BGS Geology 50k V9 is a detailed, national geological dataset produced by the British Geological Survey (BGS) at 1:50 000 scale. It has 99% coverage of Great Britain and the Isle of Man.

BGS Geology 50k V9 incorporates new and revised tiles of geology data, updates to the coastline and various corrections to geological features across the country. It also includes additional attribution including a globally unique identifier (GUID) for future compatibility and object tracking with other BGS products, linear features depicting fault trace handedness and hanging-wall orientation on fault features. A description of the changes and additional attribution is supplied with the data.

BGS BGS Geology 50k V9 describes geological areas attributed with a name based on their lithostratographical, chronostratographical or lithodemic nomenclature and their composition (rock type or lithology) in four themes:

- Bedrock Geology
solid, underlying rock formations that form the Earth's crust;

- Superficial Deposits
geological materials less than 2.6 million years old formed by natural processes such as glacial action, water and wind that lie on top of older bedrock;

- Mass Movement
superficial deposits that have moved downslope under gravity to form landslips; and

- Artificial Ground
ground surface has been significantly modified by human activity.

The product has GB-wide coverage and is the basis for other types of earth science-related mapping. In combination with other BGS datasets, typical uses cases include identifying natural resources (energy; water; minerals), construction conditions (excavations; foundations), soils and landscapes (peatlands; uplands), and hazards (flooding; landslides; contamination).