Smith’s map and ideas paved the way for a better understanding of geological time and laid the founding principles for geological surveys worldwide. His concept of using fossils to identify rocks is ...

William Smith's 1815 depiction of the geology of England ... John Henry explained: "The concept which enabled him to do the mapping and that drove him along almost obsessively was this realisation ...

William Smith's 1815 depiction of the geology of England ... John Henry explained: "The concept which enabled him to do the mapping and that drove him along almost obsessively was this realisation ...