allochthonous vs autochthonous

allochthonous and autochthonous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
allochthonous	No	Yes	No	No
autochthonous	No	Yes	No	No

allochthonous (adjective)	autochthonous (adjective)
of rocks, deposits, etc.; found in a place other than where they and their constituents were formed	of rocks, deposits, etc.; found where they and their constituents were formed
	originating where it is found