BGS Seabed Geology 10k: Bristol Channel v2
The BGS Seabed Geology 10k: Bristol Channel v.2 digital map provides detailed and accurate characterisation of the seabed geology, based on seabed and shallow-subsurface data. This dataset incorporates three complementary map components (Substrate Geology, Structural Geology, and Geomorphology) presented at 1:10 000 scale, provided as discrete layers for viewing within a Geographic Information System (GIS). The bedrock geology is divided into 23 stratigraphical units: Aber Mawr Shale Formation (ABM); Avon Group (AVO); Bridport Sand Formation (BDS); Bishopston Mudstone Formation (BISHM); Charmouth Mudstone Formation (CHAM); Carboniferous Limestone Supergroup (CL); Devonian And Carboniferous Rocks (Undifferentiated) (DEVC); Devonian Rocks (Undifferentiated) (DEV); Dyrham Formation And Beacon Limestone Formation (Undifferentiated) (DYBN); Hangman Sandstone Formation (HASA); Inferior Oolite Group (INO); Lias Group (LI); Ludlow Rocks (Undifferentiated) (LUDL); Lavernock Shale Member (LVN); Milford Haven Subgroup (MIH); Mercia Mudstone Group (MMG); Pembroke Limestone Group (PEMB); Penarth Group (PNG); Porthkerry Member (PO); Skrinkle Sandstones Subgroup (SES); St Mary's Well Bay Member (STM); South Wales Lower Coal Measures Group (SWLCM); Triassic Rocks (Undifferentiated) (TRIA). The Lexicon code of the stratigraphical units is provided in parentheses, as defined in the ‘BGS Lexicon of Named Rock Units’. The superficial deposits mapped are comprised of only marine sediments (Marine Deposits Undifferentiated (MDU)) that were classified based on their grain size. The sediments are divided into Gravel (V): Sand (S); Mud (M); Sand and Gravel (XSV); Sand and Mud (XSM); and Gravel, Sand and Mud (XVSM). The RCS code of the stratigraphical units is provided in parentheses, as defined in the ‘BGS Rock Classification Scheme’.
Simple
- Date (Creation)
- 2025-03-31
Distributor
British Geological Survey
-
Enquiries
Sophia House, 28 Cathedral Road
,
CARDIFF
,
CF11 9LJ
,
United Kingdom
029 2066 0147
Point of contact
British Geological Survey
-
Enquiries
Sophia House, 28 Cathedral Road
,
CARDIFF
,
CF11 9LJ
,
United Kingdom
029 2066 0147
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
Point of contact
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
- Maintenance and update frequency
- asNeeded As needed
- GEMET - INSPIRE themes, version 1.0
- BGS Thesaurus of Geosciences
-
- Structural geology
- UK Location (INSPIRE)
- Bed rock
- Surficial geology
- BGS Data Products
- Geomorphology
- Sea floor
- Mapping
- Citable Data
- dataCentre
- Keywords
-
- NERC_DDC
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- licenceOGL
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- 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 any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
- Other constraints
- Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
- Spatial representation type
- vector Vector
- Metadata language
- EnglishEnglish
- Topic category
-
- Geoscientific information
- Geographic identifier
-
BRISTOL CHANNEL [id=2001350]
- Date (Revision)
- 2010
N
S
E
W
- End date
- 2025-09
- Unique resource identifier
- WGS 84 (EPSG::4326)
- Distribution format
-
-
ESRI Shapefile (.shp)
()
-
ESRI Shapefile (.shp)
()
Distributor
British Geological Survey
-
Enquiries
Sophia House, 28 Cathedral Road
,
CARDIFF
,
CF11 9LJ
,
United Kingdom
029 2066 0147
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
- OnLine resource
- https://www.bgs.ac.uk/datasets/bgs-seabed-geology/
- OnLine resource
-
Digital Object Identifier (DOI)
British Geological Survey. (2025). BGS Seabed Geology 10k: Bristol Channel v2. British Geological Survey. (Dataset). https://doi.org/10.5285/f7816c02-4e24-4563-988d-b4678115052a
- OnLine resource
- Offshore GeoIndex Homepage
- Hierarchy level
- dataset Dataset
- Other
- dataset
Conformance result
- Date (Publication)
- 2011
- Explanation
- See the referenced specification
- Pass
- No
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
- See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
- Pass
- No
- Statement
- The delineation and classification of the geological substrate units were based primarily on what can be observed and interpreted from the high-resolution (2m) multibeam echo-sounder (MBES) bathymetry data collected during the Civil Hydrography Programme (CHP) surveys managed by the Maritime and Coastguard Agency (MCA). MBES backscatter, physical samples (e.g. grabs, cores, and boreholes) and previous geological mapping were also used to further inform the geological interpretation. In 2019, G. Carter, R. Ellen, J. Everest, R. Kendall and E. Phillips mapped the area covered by the HI1327, HI1326 and HI1325 MBES MCA surveys, with ESRI ArcGIS using the BGS SIGMA Desktop application. The geological linework was done at a scale ranging from 1:5000 to 1:7000, to ensure smooth linework when the dataset is viewed at a scale of 1:10000. Bedrock and superficial deposits were mapped into two independent SIGMA layers and later merged to create the Seabed Substrate layer included in this dataset. Additional attribute fields were added to the layers, in particular to the geomorphology, to complement the information captured automatically by the SIGMA. The methodology used is described in more detail in the user guide for this dataset (OR/25/041). A second phase of mapping was undertaken by R. Kendall and H. Burke in 2024 with further HI areas (HI1375, HI1449, HI1501, HI1502, HI1576, HI1662), expanding the coverage of the geological mapping area.
- File identifier
- 3907902c-abe6-4b97-e063-3050940aab0f XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2025-11-13
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Point of contact
British Geological Survey
Environmental Science Centre,Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
+44 115 936 3100
- Dataset URI
- http://data.bgs.ac.uk/id/dataHolding/13608435
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available
NERC Data Catalogue Service