The Age of the Earth |
Common terms and phrases
100 million 30 cm long 50 metres Age patterns ammonites ancient Aptian archaeocyathids B.EVANS/IGS basalt belemnites boreholes brachiopods Britain Callovian Cambrian carbon Carboniferous Carnian chronozone climate continents corals Cretaceous decay deposition Deshayesites Devonian dinosaurs Earth history element environments erosion Europe evolution evolved extinct facies fauna figure formation formed Geographical change geological column geological processes geologist glauconitic globe Gneiss granitic ice age igneous isochron isotope isotopic dating Jurassic kilometres known laid limestone lithostratigraphy lower mammals mantle marine metamorphic method metres metres long metres tall million years ago million years old mineral mollusc molten ocean floor ocean ridges Ordovician Palaeozoic Phanerozoic Pleistocene Precambrian provinces Quaternary radioactive range recognised reptile rock layers rock type rock units rubidium sample Sandstone sea floor sea level sediment sedimentary rocks shale shelf sea Silurian species stage strata stratigraphic time-correlation traced Triassic trilobites type section upper volcanic zone