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1. Originating or formed in a place other than where found: allochthonous rocks; an allochthonous population.
2. Ecology Not indigenous: an allochthonous organism.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Geological Science) (of rocks, deposits, etc) found in a place other than where they or their constituents were formed. Compare autochthonous1
[C20: from Greek allokhthon, from allo- + khthōn (genitive khthonos) earth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
See also related terms for sediment.
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|Adj.||1.||allochthonous - of rocks, deposits, etc.; found in a place other than where they and their constituents were formed|
autochthonous - of rocks, deposits, etc.; found where they and their constituents were formed
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