Search Result for "allochthonous": 
Wordnet 3.0

ADJECTIVE (1)

1. of rocks, deposits, etc.; found in a place other than where they and their constituents were formed; 



WordNet (r) 3.0 (2006):

allochthonous
    adj 1: of rocks, deposits, etc.; found in a place other than
           where they and their constituents were formed [ant:
           autochthonous]