Diversity in the science and practice of engineering geology by Mark J. Eggers Geological Society, London, Engineering Geology Special Publications Volume 27(1):1-18 September 21, 2016 © 2016 The Author(s). Published by The Geological Society of London

Cavern 3 from Longyou, China, part of a system of human-excavated caverns thought to be 2000–2500 years old (photo courtesy of Dr P. Pells). Cavern 3 from Longyou, China, part of a system of human-excavated caverns thought to be 2000–2500 years old (photo courtesy of Dr P. Pells). Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Knowledge v. solution skills matrix from Roberts (1963) as reported in Stapledon (1996). Knowledge v. solution skills matrix from Roberts (1963) as reported in Stapledon (1996). (a) Communication gap between geologists (G) and engineers (E). (b) Measure of value for individuals Case I Specialists, Case II Narrowly trained engineer, Case III Broad-based geotechnical engineer or engineering geologist. Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Rational approach to conducting subsurface investigations from Stapledon (1982), showing how geology and engineering integrates at each functional level of the investigation. Rational approach to conducting subsurface investigations from Stapledon (1982), showing how geology and engineering integrates at each functional level of the investigation. Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Communication model for engineering geology on large, complex projects. Communication model for engineering geology on large, complex projects. After Baynes (1999). Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Relationship between geology for engineers and engineering geology and the origin of research questions. Relationship between geology for engineers and engineering geology and the origin of research questions. After de Freitas (2009). Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Comparison of graphic log systems illustrating the difference in geological message between (a) use of basic symbols used with ‘artistic flexibility’ and (b) computer-generated log. Comparison of graphic log systems illustrating the difference in geological message between (a) use of basic symbols used with ‘artistic flexibility’ and (b) computer-generated log. After Stapledon (1986). While computer logging has come a long way since 1986, a degree of inflexibility remains in graphically illustrating important geological features. Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Evaluation risk v. degree of innovation. Evaluation risk v. degree of innovation. After Griffiths (2014). Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Model types, project stages and the role of the engineering geologist. Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London

Flowchart illustrating application of the principles of engineering geology. Flowchart illustrating application of the principles of engineering geology. After Baynes (1999). Mark J. Eggers Geological Society, London, Engineering Geology Special Publications 2016;27:1-18 © 2016 The Author(s). Published by The Geological Society of London