autochthonous
Concise Oxford English Dictionary © 2008 Oxford University Press:
autochthonous /ɔːˈtɒkθənəs/
▶adjective
- 1 indigenous.
- 2 Geology (of a deposit or formation) formed in its present position. Often contrasted with allochthonous.
'autochthonous' also found in these Oxford entries:

