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allochthonous

[uh-lok-thuh-nuh s] /əˈlɒk θə nəs/
adjective, Geology, (of rocks, minerals, etc.)
1.
not formed in the region where found.
Compare autochthonous (def 4).
Origin
1910-1915
1910-15; allo- + -chthonous, modeled after autochthonous
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for allochthonous

allochthonous

/əˈlɒkθənəs/
adjective
1.
(of rocks, deposits, etc) found in a place other than where they or their constituents were formed Compare autochthonous (sense 1)
Word Origin
C20: from Greek allokhthon, from allo- + khthōn (genitive khthonos) earth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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