The Paleozoic Era The Paleozoic is bracketed by two of the most important events in the history of animal life. At its beginning, multicelled animals underwent a dramatic explosion in diversity, and almost all living animal phyla appeared within a few millions of years. At the other end of the Paleozoic, the largest mass extinction in history wiped out approximately 90% of all marine animal ...

The Fossil Company - The Palaeozoic Era. An illustrated geological time line for the Palaeozoic era, which includes the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods.