411 REFERENCE · Wiktionary
Autunian
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en Autun ian. Derived from the Autun Basin, where the first geological rock layers originating from this period were found and studied.
Proper noun
1
en geology An age from ~300 to ~275 million years ago, a subdivision of the Carboniferous-Permian.