SCIENCE|natural and applied sciences|earth sciences|geology
- an ré Phailéasóch Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Palaeozoic | Paleozoic | Palaeozoic era
- en
- Definition geologic time that began 538.8 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history Reference "Robison, Richard A. and Crick, Rex E.. ""Paleozoic Era"" (13.2.2024). Encyclopedia Britannica, 12 Jan. 2024"