User guide for BGS Seabed Geology 10k : Offshore Yorkshire

British Geological Survey. 2023 User guide for BGS Seabed Geology 10k : Offshore Yorkshire. Edinburgh, UK, British Geological Survey, 53pp. (OR/22/063) (Unpublished)

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The BGS Seabed Geology 10k: Offshore Yorkshire digital map comprises three complimentary components: 1) Substrate Geology, showing the distribution of Bedrock and Superficial geological units interpreted to be dominant within the top 1 m below seabed; 2) Structural Geology, delineating the principle structural features such as faults and folds observed at rockhead; and 3) Seabed Geomorphology, classifying the physical morphology and interpreted geomorphic character of the seabed. This geospatial product is the result of analysing, interpreting, and classifying a number of high-resolution, multibeam echo-sounder (MBES) bathymetry datasets, supported by further data and information, e.g., MBES backscatter, physical samples (e.g., grabs, cores, and boreholes), seismic data, academic and publicly accessible industry literature, and previous BGS mapping (e.g.,1:250k maps). The bedrock geology comprises Triassic, Jurassic, and Cretaceous sedimentary rocks, with bedrock commonly outcropping in the northern and central parts of the map area. Triassic rocks of the Bacton, Haisborough, and Lias Groups are dominant in the north, whereas Cretaceous Chalk is dominant in the central areas. Extensive folding, fracturing, and faulting is observed at rockhead, indicative of the complex structural evolution of the southern North Sea basin. Superficial deposits comprise several Quaternary deposits, in particular Late Pleistocene subglacial till of the Bolders Bank Formation. Post glacial channel-infill deposits are also common as well as Holocene through modern unconsolidated marine sediments. The Seabed Geomorphology records a range of relict features and active processes, including: ‘Bedrock ridges’, Late Pleistocene ‘Ice-marginal moraines’, and active marine sedimentary ‘Current-induced bedforms’ e.g., ‘Sediment Waves’. The map citation, metadata and overview can be found here: British Geological Survey (2023): BGS Seabed Geology 10k: Yorkshire version 1.0. (Dataset) The information provided in this user guide is intended to provide a quick-start guide to using and understanding this BGS digital product.

Item Type: Publication - Report
Funders/Sponsors: British Geological Survey
Additional Information. Not used in RCUK Gateway to Research.: This item has been internally reviewed, but not externally peer-reviewed.
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Date made live: 10 Mar 2023 17:01 +0 (UTC)

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