[adjective] of rocks, deposits, etc.; found where they and their constituents were formed
[adjective] originating where it is found; "the autochthonal fauna of Australia includes the kangaroo"; "autochthonous rocks and people and folktales"; "endemic folkways"; "the Ainu are indigenous to the northernmost islands of Japan" Synonyms:autochthonal, autochthonic, endemic, indigenous
