Colour-coded geological map of part of Roxburghshire and Selkirkshire, from a survey of or prior to 1883 by James Geikie and Benjamin Neeve Peach as part of the Geological Survey of Great Britain.

Colour-coded geological map of parts of Berwickshire, Selkirkshire and Roxburghshire, from a survey of or prior to 1879 by Sir Archibald Geikie, James Geikie and Benjamin Neeve Peach as part of the Geological Survey of Great Britain.

Colour-coded geological map of counties of Dumbarton and parts of the surrounding counties, from a survey of or prior to 1875 by Sir Archibald Geikie, James Geikie, Edward Hull, Benjamin Neeve Peach and Robert Logan Jack as part of the Geological Survey of Great Britain.

Colour-coded geological map of Edinburgh and part of Midlothian, from a survey of or prior to 1859 by Sir Archibald Geikie and Henry Hyatt Howell as part of the Geological Survey of Great Britain.

Colour-coded geological map of part of Berwickshire, from a survey of or prior to 1863 by Sir Archibald Geikie and Henry Hyatt Howell as part of the Geological Survey of Great Britain.

Colour-coded geological map of part of south-east Fife and north East Lothian, from a survey of or prior to 1861 by Henry Hyatt Howell as part of the Geological Survey of Great Britain.

Colour-coded geological map of eastern Perthshire and part of Fife, from a survey of or prior to 1883 by James Geikie, Henry Hyatt Howell, Benjamin Neeve Peach and John Young as part of the Geological Survey of Great Britain.

Colour-coded geological map of south-east Angus and north-east Fife, from a survey in 1884 by James Geikie, Henry Hyatt Howell and HM Skae as part of the Geological Survey of Great Britain.

Colour-coded geological map of part of south-east Angus and north-east Fife, from a survey of or prior to 1884 by James Geikie and Henry Hyatt Howell as part of the Geological Survey of Great Britain.

Chart detailing the colours, patterns etc. used by the Geological Survey of Great Britain when marking up maps.