Figure 2.
This geological cross-section map displays the elevation profile from West to East, detailing the various geological layers beneath the surface along a specified distance. The map shows the elevation in metres relative to Ordnance Datum with an indication of significant landmarks, including tunnels and fault zones, particularly the London Bridge fault zone and West Putney fault zone. A clear depiction of the River Thames is also noted, with various geological formations labelled, including Superficial deposits, Thames Group, Lambeth Group, and the Thanet Formation. The map is structured with horizontal layers representing geological strata and vertical lines indicating fault lines, along with a gradient illustrating the changes in elevation.Ground model for the main tunnel (modified from Newman (2022)) indicating the position of significant regional fault structures, the West Putney and London Bridge fault zones and the Lambeth Anticline (Newman and Hadlow, 2021)