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
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- EXT_DS121846
- Alternative Title
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- 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
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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.
Extent
Extent
Bounding Box
Distribution
Distribution
- Format Type and Description
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Geographic Information System
Geographic Information System
()
- Specification
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ESRI Feature Class
-
Geographic Information System
Geographic Information System
()
- Resource Locator
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View Full Discovery Metadata: BGS Geology Marine Sediments 250k DigSBS250
World Wide Web page
- Resource Locator
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View Full Discovery Metadata: BGS Geology 250k DiGMapGB-250
World Wide Web page
- Resource Locator
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View Full Discovery Metadata: BGS Geology Marine Bedrock 250k DigRock250
World Wide Web page
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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
Keywords
- Type
- Theme
Citation
- Date (Revision)
- 2013-04-03
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
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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
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© 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