Adjectives

(a)autochthonousof rocks, deposits, etc.; found where they and their constituents were formed
(s)autochthonal, autochthonic, autochthonous, endemic, indigenousoriginating 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”