allochthonous
adjective/əˈlɒkθənəs/
/əˈlɑːkθənəs/
(geology)- (of rock) formed at a distance from its present position compare autochthonousWord Originearly 20th cent.: from allo- ‘other’ + Greek khthōn ‘earth’ + -ous.
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allochthonous