OR/15/035 Model development log

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Thompson, J F. 2015. Model metadata report for HS2 Area 4. British Geological Survey Internal Report, OR/15/035.

The HS2 Area 4 geological model was constructed using GSI3D software according to corporate standards and methodology. This involves databasing borehole records, correlating cross-sections using geological map data, borehole and auger records to constrain the modelled units. The spatial distribution of each unit is based on geological map data for those that crop out at the surface and the cross-sections are queried for the distribution of concealed units. The development is contained within Appendix 1.

Additional changes were made to the model following QA, these are documented in the QA checking document HS2_Area_4_Metadata_document_v2_HBU_JT.doc