Share this entry
allochthonous Syllabification: al·loch·tho·nous
Pronunciation: /əˈläkTHənəs/

Definition of allochthonous in English:


Denoting sediment or rock that originated at a distance from its present position. Often contrasted with autochthonous.
Example sentences
  • The fossils of the westernmost exposures of the Hoko River Formation are allochthonous, preserved in reworked concretions within conglomerates that were deposited as part of a submarine fan system during late Eocene time.
  • However, this does not prove that the Moine rocks necessarily constitute an allochthonous terrane in the North American sense.
  • Although some skeletal remains are evidently allochthonous, other remains are probably parautochthonous.


Early 20th century: from allo- 'other' + Greek khthōn 'earth' + -ous.

Definition of allochthonous in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources