The June 2017 edition of Geoscientist, published by the Geological Society of London, contains an article about the Geological Society ‘Students’ Instructional Tours" (On seeing the most rocks  https://www.geolsoc.org.uk/Geoscientist/June-2017/On-seeing-the-most-rocks ). Many well-known names including Eric Robinson, Trevor D Ford, Derek Flynn and Geoff Tresise (Liverpool Museum). It is worth a read just to see how important geological fieldwork was.