Definition of allochthonous in English:


Line breaks: al¦loch¦thon|ous
Pronunciation: /əˈlɒkθənəs


  • Denoting a deposit or formation that originated at a distance from its present position. Often contrasted with autochthonous.
    More 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.

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