British Geological Survey (BGS): 250k Onshore and Offshore Geology (3rd Party Data)

The British Geological Survey (BGS) is a UK provider of geoscientific data, information and knowledge. Natural Resources Wales has licenced access to a number of BGS datasets. This particular spatial data is a collation of licenced data from DiGMapGB-250, DigSBS250 and DigRock250 all of which depict the data at a scale of 1:250,000.

Identification

Identifier
EXT_DS121846
Alternative Title
  • BGS 250k Bedrock
  • BGS 250k SeaBed Sediments WGS84 FOLK
  • BGS 250k SeaBed Sediments WGS84 RCS
  • BGS 250k Linear Bedrock Offshore WGS84
  • BGS 250k Irishsea geology
  • BGS 250k Fault Line
  • BGS 250k Bedrock Off shore WGS84
  • BGS Geology: marine sediments 250k | DigSBS250
  • BGS Geology: marine bedrock 250k | DigRock250
  • BGS Geology 250k | DiGMapGB-250
Metadata Language
English
Lineage

NRW has access to: - 250k Onshore Bedrock: The geological areas (or polygons) are labelled or attributed with a name (based on their lithostratographical, chronostratographical or lithodemic nomenclature) and their composition (rock type or lithology). This information is arranged in two themes: bedrock geology and faults. - 250k Marine Bedrock: The overlying column of sea-water imposes major limitations offshore that makes it impossible to use normal, onshore, geological mapping techniques. However, other techniques such as ship-board geophysical surveys can be used that allow geological interpretations using evidence not normally available onshore. Onshore, a lithostratigraphical nomenclature is used with rocks routinely mapped at formation, member and bed level. Offshore, this is often impossible and rocks are commonly referred to by age. Where it is possible, mapping is usually only to group or formation level at best, and even these may not be differentiated into individual units, but shown only as part of a package of units. -250k Marine Sediments: The overlying column of sea-water imposes major limitations offshore that makes it impossible to use normal, onshore, geological mapping techniques. However, other techniques such as ship-board geophysical surveys can be used that allow geological interpretations using evidence not normally available onshore. The sea-bed sediments theme is only mapped offshore, where it commonly forms a veneer on the sea bed. The map is based on sea-bed grab samples of the top 0.1 m, combined with cores and dredge samples as available. A standard Folk triangle classification has been used based on the gravel percentage and the sand to mud ratio.
Dataset Reference Date (Revision)
2025-10-28
Owner
  British Geological Survey (BGS) -
British Geological Survey, Environmental Science Centre, Nicker Hill, Keyworth, Nottingham , Nottingham , NG12 5GG
https://www.bgs.ac.uk/
Originator
  British Geological Survey (BGS) -
British Geological Survey, Environmental Science Centre, Nicker Hill, Keyworth, Nottingham , Nottingham , NG12 5GG
https://www.bgs.ac.uk/
 

Extent

Extent

Bounding Box

 
 

Distribution

Distribution

Format Type and Description
  • Geographic Information System ( )

    Specification

    ESRI Feature Class

Resource Locator
View Full Discovery Metadata: BGS Geology Marine Sediments 250k DigSBS250

World Wide Web page

Resource Locator
View Full Discovery Metadata: BGS Geology 250k DiGMapGB-250

World Wide Web page

Resource Locator
View Full Discovery Metadata: BGS Geology Marine Bedrock 250k DigRock250

World Wide Web page

 

Quality

Data quality

Quality Scope
Dataset
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

NRW has access to: - 250k Onshore Bedrock: The geological areas (or polygons) are labelled or attributed with a name (based on their lithostratographical, chronostratographical or lithodemic nomenclature) and their composition (rock type or lithology). This information is arranged in two themes: bedrock geology and faults. - 250k Marine Bedrock: The overlying column of sea-water imposes major limitations offshore that makes it impossible to use normal, onshore, geological mapping techniques. However, other techniques such as ship-board geophysical surveys can be used that allow geological interpretations using evidence not normally available onshore. Onshore, a lithostratigraphical nomenclature is used with rocks routinely mapped at formation, member and bed level. Offshore, this is often impossible and rocks are commonly referred to by age. Where it is possible, mapping is usually only to group or formation level at best, and even these may not be differentiated into individual units, but shown only as part of a package of units. -250k Marine Sediments: The overlying column of sea-water imposes major limitations offshore that makes it impossible to use normal, onshore, geological mapping techniques. However, other techniques such as ship-board geophysical surveys can be used that allow geological interpretations using evidence not normally available onshore. The sea-bed sediments theme is only mapped offshore, where it commonly forms a veneer on the sea bed. The map is based on sea-bed grab samples of the top 0.1 m, combined with cores and dredge samples as available. A standard Folk triangle classification has been used based on the gravel percentage and the sand to mud ratio.
 

Keywords

Keywords

NRW Thesaurus
  • 3rd Party Data
  • Third Party Data
Type
Theme

Citation

Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

IPSV Subjects List
  • Geology
Type
Theme

Citation

Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects
 

Spatial Reference System

Code
NONE
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

This dataset is wholly owned by the British Geological Society. NRW may provide access to this dataset on request in some circumstances. However, enquirers are advised to obtain a copy from the owner/originator directly, rather than NRW. NRW may NOT publish or disseminate it in its entirety.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© British Geological Society NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Those seeking such permission should approach the originator directly. Attribution Statement: British Geological Survey BGS Digital Data under Licence Number 2013/062 ©NERC; Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313231383436 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2025-10-28T11:41:15.39Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  -
 
 

Publishing Body

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