dataset · Northern Ireland
GSNI 50K Bedrock
1:50,000 maps showing the main geological bedrock divisions in Northern Ireland. The bedrock shown on each map comprises the bedrock geology, which represents the outcrops (at surface) and subcrops (at near-surface, beneath superficial deposits) in Northern Ireland. For each rock unit there is a brief generalised description showing the major rock group, rock type and age under the following headings. LEX_D: The name of the selected area. This can be a group, formation or igneous intrusion e.g.
Visit source ↗Source details
Licence: ["The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in an
Evidence quality: 37.1
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- bedrock geology (outcrop and subcrop) map · rock unit name (LEX_D) · dominant lithology (RCS_D) · rock age range by period (Min_Time_D / Max_Tim_D) · map code from 1:250,000 map (LEX_RCS)
- Coverage docs-verified
- Northern Ireland
- Resolution docs-verified
- 1:50,000 map scale
- Update frequency docs-verified
- continual
- Formats docs-verified
- HTML
- Access docs-verified
- Public web access via data.gov.uk, no authentication. Licence: BGS/NERC copyright; reproduction or transmission requires prior permission of the copyright holder.
Useful for
- Use cases llm-inferred
- Regional bedrock context for a desk-based ground model in Northern Ireland · Broad-scale geology screening for water-resources or civils scoping across large study areas · Background geological context for a preliminary environmental or planning appraisal
- Audience llm-inferred
- geotechnical engineers · hydrogeologists · environmental consultants · planners · GIS analysts
Limitations
- Constraints docs-verified
- Generalised 1:50,000 scale; not suitable for site-specific geology · Does not resolve individual formations within broad rock-type areas · Copyright restrictions on reproduction without BGS/NERC permission · No API or MCP tools listed in the catalogue entry
Evidence
- https://mapapps2.bgs.ac.uk/GSNI_Geoindex/home.html
- https://www.data.gov.uk/dataset/2eb350f9-b72f-4b98-b565-675bcafbbd05/gsni-50k-bedrock
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.