OR/15/069 Model workflow

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Waters, C N, Terrington, R, Cooper, M R, Raine, R B, and Thorpe, S. 2015. The construction of a bedrock geology model for the UK: UK3D_v2015. British Geological Survey Internal Report, OR/15/069.

A standard GSI3D workflow (Kessler & Mathers 2004[1]; Kessler et al. 2009[2]) was followed for the construction of the cross-sections. The full network of section lines for UK3D_v2015 is shown in Figure 13. Construction of cross-sections is performed in the GSI3D section window. This displays all the required information including the topography along the section, the bedrock geology at surface or rockhead, boreholes, intersections of crossing sections with the intercepts for individual units, surface traces from existing models displayed as raster backdrops. Structure contour maps are displayed in the GSI3D map window which is dynamically linked to the section window.

Figure 13 The completed network of cross-sections for the UK3D_v2015 dataset.

The geological units are normally constructed as unit base lines drawn in order going down the stratigraphic stack. The sections progressively colour up as the units are added.

Workspaces for section construction, including the alignments of all the revised, new and existing cross-sections, were prepared by the BGS data management team. Existing sections were cut and terminated at regional boundaries utilising a specially developed tool for use in GSI3D. Each regional geologist(s) then completed construction of their allocated set of cross-sections and checked them for internal consistency. The interpretations where then reviewed along the boundaries of regions by pairs of geologists to produce a consistent agreed interpretation from which a master dataset was compiled. The entire model was then reviewed for stratigraphic cohesion and consistency.

Geologists responsible for individual regions are listed in Table 1. The regional areas are shown in Figure 14 for which regional descriptions are available for regions 7–20 for download from http://www.bgs.ac.uk/research/ukgeology/regionalGeology/home.html. These geological summaries are intended to inform the general public of the geology in each of the regions covered by the model.

Figure 14 Areas based on the BGS Regional Guide Series for which regional summaries of the geology have been produced. No regional summaries were produced for Scotland (regions 1–6).

The revised model produced by this study is shown in Figure 15 and comprises part of the new UK3D_v2015 dataset. The dataset is freely available in a variety of formats from the BGS website at: http://www.bgs.ac.uk/research/ukgeology/nationalGeologicalModel/GB3D.html

Table 1 QA roles and regional geologists for the areas in Figure 14.
Number Region Geologist(s)
1 Orkney & Shetland Orkneys included in Northern Ireland
2 Northern Highlands Hugh Barron/Clive Auton/Graham Leslie
3 Tertiary Volcanic Districts Included in Northern Highlands
4 Grampian Highlands Graham Leslie
5 Midland Valley of Scotland Graham Leslie/Mike McCormac
6 South of Scotland Graham Leslie/Mike McCormac
7 Northern England David Millward/Colin Waters
8 Pennines & adjacent areas Colin Waters
9 Eastern England Jon Ford/John Powell
10 Central England Mark Barron
11 Welsh Borders Oliver Wakefield
12 East Anglia Steve Mathers
13 London-Thames Steve Mathers
14 Weald Peter Hopson
15 Hampshire Basin Peter Hopson
16 Bristol & Gloucester Mark Barron
17 South West England Richard Haslam/Poul Strange
18 North Wales and South Wales (combined) David Schofield/Phil Wilby
20 Northern Ireland Mark Cooper/Robert Raine
Stratigraphic review Colin Waters/Mark Barron/Peter Hopson/Steve Mathers
England-Scotland border review Colin Waters/David Millward
QA and sign-off Steve Mathers (England & Wales)
Colin Waters (Northern Ireland)
Diarmad Campbell (Scotland)
Figure 15 The revised cross-section framework included in the UK3D_v2015 dataset.

References

  1. Kessler, H and Mathers S J. 2004. Maps to models. Geoscientist 14/10 4–6. http://nora.nerc.ac.uk/983/
  2. Kessler, H, Mathers, S J, and H-G, Sobisch. 2009. The capture and dissemination of integrated 3D geospatial knowledge at the British Geological Survey using GSI3D software and methodology. Computers & Geosciences, 35, 1311–1321. {{#if:10.1016/j.cageo.2008.04.005%3B|DOI 10.1016/j.cageo.2008.04.005%3B}}http://nora.nerc.ac.uk/7207/1/Kessler_CG_GSI3D_article_final.pdf