Meaning : Of rocks, deposits, etc.. Found where they and their constituents were formed.
Of rocks, deposits, etc.. Found in a place other than where they and their constituents were formed.
allochthonousMeaning : Originating where it is found.
Example :
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