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allochthon

 - 1 dictionary result

al⋅loch⋅thon

[uh-lok-thuhn, -thon]
–noun Geology.
a geological formation not formed in the region where found and moved to its present location by tectonic forces. Compare autochthon (def. 3).

Origin:
1940–45; back formation from allochthonous
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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