User guide : BGS Offshore Bedrock 250k Dataset

User guide : BGS Offshore Bedrock 250k Dataset

British Geological Survey. 2021 User guide : BGS Offshore Bedrock 250k Dataset. Nottingham, UK, British Geological Survey, 22pp. (OR/21/009) (Unpublished)

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Abstract/Summary

The BGS Offshore Bedrock 250k dataset is a digital geological map portraying the bedrock geology of the UK Exclusive Economic Zone (EEZ) at a scale of 1:250 000. This comprehensive product provides a digital compilation of the original paper maps published by BGS at the same scale with additional re-interpretation from regional geological studies. The composition, age and deformational history of the rocks underlying the seabed are important for a range of stakeholders, including marine habitat mappers, marine spatial planners and offshore industries (in particular, the cable, pipeline and dredging industries). This information is arranged in two GIS layers: • Bedrock Lithostratigraphy and • Bedrock Structural geology. The polygons within the Bedrock Lithostratigraphy layer show the spatial distribution of the principal lithostratigraphical units (formations and groups). The structural geology layer comprises polylines which show the location and extent of known structural features such as faults and folds. The BGS Offshore Bedrock 250k dataset covers most of the UK EEZ and some of the adjacent waters. This small-scale mapping was derived from geophysical data (e.g. airgun, boomer, sparker, sidescan sonar, magnetometer, gravity meter) and data obtained from commercial wells and BGS shallow boreholes. The variations in data density will be reflected in the detail of the mapping. This dataset can be used in conjunction with other small scale offshore geological datasets: • BGS Seabed Sediments dataset (BGS, 2021a) • BGS Seabed Hard Substrate dataset This user guide provides the information required to enable the reader to understand and use this BGS data product.

Item Type:

Publication - Report

Funders/Sponsors:

British Geological Survey

Additional Information:

This item has been internally reviewed, but not externally peer-reviewed.

Date made live:

20 Aug 2025 09:50 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/540094