OR/15/035 Modelled surfaces/volumes
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| Thompson, J F. 2015. Model metadata report for HS2 Area 4. British Geological Survey Internal Report, OR/15/035. |
| Geological unit | Age | Model name |
| Alluvium | Quaternary | ALV-XCZSV |
| Head | Quaternary | HEAD-XCZSV |
| Glaciofluvial deposits Mid Pleistocene | Mid Pleistocene | GFDMP-XSV |
| Till | Mid Pleistocene | TILMP-DMTN |
| White Limestone Formation | Mid Jurassic | WHL-LMST |
| Rutland Formation | Mid Jurassic | RLD1-MDST |
| Taynton Limestone Formation | Mid Jurassic | TY-LMOOL |
| Wellingborough Limestone Member | Mid Jurassic | WBRO-LMST |
| Sharp’s Hill Formation | Mid Jurassic | SHHB-ARSL |
| Rutland Formation | Mid Jurassic | RLD-MDST |
| Stamford Member | Mid Jurassic | STAM-SDSL |
| Horsehay Sand Formation | Mid Jurassic | HYSA-SDST |
| Northampton Sand Formation | Mid Jurassic | NS-SDLI |
| Whitby Mudstone Formation | Early Jurassic | WHM-MDST |
| Marlstone Rock Formation | Early Jurassic | MRB-FLIR |
| Dyrham Formation | Early Jurassic | DYS-SIMD |
| Charmouth Mudstone Formation | Early Jurassic | CHAM-MDST |
| Rugby Limestone Member | Early Jurassic | RLS-MDLM |
| Saltford Shale Member | Late Triassic to Early Jurassic | SASH-MDST |
| Langport Member | Late Triassic | LPMB-LMST |
| Penarth Group | Late Triassic | PNG-AROCLS |
| Blue Anchor Formation | Late Triassic | BAN-MDST |
| Branscombe Mudstone Formation | Late Triassic | BCMU-MDST |
| Sidmouth Mudstone Formation | Early to Late Triassic | SIM-MDST |
The Rutland Formation is divided into two units (RLD-MDST and RLD1-MDST) to account for the Wellingborough Limestone Member which occurs in the middle of the Rutland Formation.