pre-palæozoic
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premeridian — |prē+ adjective Etymology: pre + meridian : happening or being before noon * * * premeridian, a. (priːməˈrɪdɪən) [pre B. 1 a.] Occurring before noon; in Geol., applied by H. D. Rogers to the seventh of his fifteen subdivisions of the Palæozoic… … Useful english dictionary
Chitinozoan — Temporal range: 489–358 Ma … Wikipedia
Permian–Triassic extinction event — … Wikipedia
Cretaceous–Tertiary extinction event — Artist s rendering of bolide impact Badlands nea … Wikipedia
Carboniferous — For the album by Zu see Carboniferous (album). Carboniferous Period 359.2–299 million years ago … Wikipedia
Devonian — For the Celtic language, see Southwestern Brythonic language; for the residents of the English county, see Devon. Devonian Period 416–359.2 million years ago … Wikipedia
Ordovician — Period 488.3–443.7 million years ago … Wikipedia
Permian — For the language family, see Permic languages. For the high school, see Permian High School. For the geological basins, see Permian Basin. Permian Period 299–251 million years ago … Wikipedia
Echinoderm — Temporal range: Cambrian–recent … Wikipedia
