Plate 1. A. Trent catchment. Imagery from NEXTMap Britain TM B. Geology of the catchment area with historic quarry sites Ku – Upper Cretaceous (Chalk Group); Kl – Lower Cretaceous; Ju – Upper Jurassic; Jm – Middle Jurassic; Jl – Lower Jurassic; T – Triassic; P – Permian, Cw – Carboniferous (Westphalian); Cn – Carboniferous – Namurian; Cd – Carboniferous (Dinantian) Plate 2, A) Whitwick, Leicestershire - Charnian slates and Mountsorrel granodiorites; B) Mount St Bernard’s Abbey - Charnian slates with Ketton limestone dressings; C) Express buildings, Nottingham - Darley Dale Stone with Mansfield Red decoration; D) Courts of Justice, Nottingham – Red Mansfield pilasters with Triassic sandstone ashlar; E) Southwell Minster, Nottinghamshire – White Mansfield ashlar; F) Southwell Minster, Nottinghamshire – Triassic Skerry Sandstone internal rubble- stone walling; G) St Andrew’s Church, Nottingham – Bulwell Golden Stone with pale Ancaster limestone dressings; H) Averham Church, Nottinghamshire, Norman herringbone masonry – Triassic Skerry sandstone Plate 3. I) Long Clawson, Leicestershire – Marlstone Rock Formation, Ancaster dressings with Swithland Slate roof; J) Newark, Nottinghamshire – Lias Limestone with Ancaster Dressings; K) Lincoln Cathedral, Lincolnshire – Lincolnshire Limestone throughout; L) Midland Hotel, St Pancras, London – Lancaster Stone capitals and bases; M) Wymeswold Church, Leicestershire – Fluvio-glacial boulders used in repairs to Lias Limestone fabric; N) Lincoln Cathedral – Tournai Font, Belgian limestone; O) Lincoln Cathedral – Purbeck Marble columns; P) Bottesford Church, Leicestershire – Chellaston Alabaster; Q) Font, All Saints Church, London – Derby Fossil limestone decoration throughout church. Plate 4. The model building workflow (A-E) in GSI3D and example analytical outputs (F-H) that can be derived from the calculated model within the Subsurface Viewer (© INSIGHT). The model shown comprises some 1200 sq km of the Sudbury-Ipswich- Felixstowe area of southern East Anglia..