Process by which continental crust (sial) is converted into oceanic crust (sima).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a hypothetical process by which a deep sea or ocean basin with oceanic crust replaces dry land or a shallow sea basin with a continental crust.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.