14. Geological History (4): Maps William Smith (1769-1839) http://en.wikipedia.org/wiki/Image: William_Smith.g.jpg The Map that changed the World Some of Smith’s fossils
15.
16. Geological History (6): Stratigraphy A tug-of-war as rocks got sorted into geological periods in the new science of stratigraphy commons.wikimedia.org/wiki/Image :Adam_Sedgwick.jpg en.wikipedia.org/wiki/Image:Roderick _Murchison.jpg Murchison Sedgewick
17. Geological History (7): Periods Carboniferous Cambrian Ordovician Silurian Devonian Permian Triassic Jurassic Cretaceous Tertiary Quaternary