article: History of the geologic time scale
links: Quaternary Georges Cuvier Counties of England James Hutton England Earth Devon Radioactive decay Palaeozoic Palaeocene Theory of the Earth Welsh people Mesozoic William Smith (geologist) Wales Deposition (geology) Scotland Holocene Global Boundary Stratotype Section and Point Tertiary Pliocene Briton Earth history Pleistocene Nicolaus Steno Russia Perm Carboniferous Europe