Offshore Quaternary 250k UK
type: Dataset
description: This Offshore Quaternary dataset shows the distribution of interpreted lithostratigraphic units within the shallow subsurface. Large areas of the UK offshore are covered, at a scale of 1:250 000. This dataset was originally published between 1984 and 1992, as a series of paper map sheets. This is the first time that the Quaternary Geology 1:250 000 maps have been made available in digital format. Information from the original map sheets have been included in the attribute fields in this dataset, including a lithological description for each formation. Additional data has also been provided where it was deemed to add value. The BGS lexicon code for each formation has been supplied, so users can research any formation of interest. The maximum and minimum age of each formation, in a variety of formats, has also been added. This key information was sourced from Stoker et al (2011). Our understanding of the Quaternary lithostratigraphy is evolving due to the increased data collection associated with renewable energy development. However, no formal update of the regional lithostratigraphic framework has been completed at time of release. This dataset therefore reflects the understanding at the time of original publication. Inaccuracies in the dataset may have since been resolved and the level of uncertainty regarding the age or character of a formation may have changed. Nonetheless, this dataset contains valuable information, and this digital version will help facilitate access to this for users.
issued: 2026-01-14T16:31:49.531271
modified: 2026-07-30T20:37:02.377685
spatial: Location
  geometry: {"type": "Polygon", "coordinates": [[[4.0000, 50.6000], [-10.0500, 50.6000], [-10.0500, 62.0000], [4.0000, 62.0000], [4.0000, 50.6000]]]}
keyword: Marine sediments
keyword: NERC_DDC
keyword: Quaternary
keyword: Sea floor
keyword: Shallow geology

Citation Information - Digital Object Identifier (DOI)
type: Distribution
description: British Geological Survey. (2026). Offshore Quaternary 250k UK. British Geological Survey. (Dataset). https://doi.org/10.5285/e1f03873-9619-4c69-8190-371330274108
issued: 2026-07-30T20:37:02.428418
modified: 2026-07-30T20:37:02.384631
access URL: https://doi.org/10.5285/e1f03873-9619-4c69-8190-371330274108

BGS Datasets - Offshore Quaternary 250K
type: Distribution
description: This page provides further information about the Offshore Quaternary 250k UK dataset, including a user guide and links to download the data.
issued: 2026-07-30T20:37:02.428420
modified: 2026-07-30T20:37:02.384700
access URL: https://www.bgs.ac.uk/datasets/offshore-quaternary-250k/

British Geological Survey (BGS)
type: Organization