#Autun

• Autun — A city and commune in eastern France, located in the Saône-et-Loire department, within the Bourgogne-Franche-Comté region; founded during the Roman Empire by Emperor Augustus under the name Augustodunum, the city is famous for its well-preserved ancient remains and for being the type locality (stratotype) where the Autunian geological stage was defined.
• Autunian — A transitional geological stage located at the base of the Lower Permian (or late Upper Carboniferous), defined by successions of oil shales rich in fossil flora (Callipteris conferta) historically researched in the basin of Autun, France; as an adjective, it refers to the formations, rocks, or fauna specific to this time interval.
• Autunite — A mineral from the phosphate class, hydrated uranium and calcium phosphate, with the chemical formula Ca(UO2)2(PO4)2·10-12H2O, featuring a brilliant greenish-yellow color; it is a highly radioactive mineral that fluoresces under ultraviolet light, historically discovered in the Autun region (France) and used as a secondary uranium ore.