Loanian

The Loanian Period is the middle period of the Promesolithic Era, lasting between 420 and 340 million years. In these 80 million years, animal and plant life rapidly made its way onto land, with the first amphibians and trees appearing at the Loanian's close. A mass extinction would mark the end of various kinds of placoderms (armored fish) and marine invertebrates as well. The period itself is named after the Lo'Oix people of Eldham, for it was on their lands that the first rocks of the Loanian were described scientifically.