Stratification is the building up of layers, and can have several meanings
Wikipedia,
the free encyclopedia © 2001-2006 Wikipedia
contributors (Disclaimer)
This article is licensed under the GNU
Free Documentation License.
Last updated on Monday September 24, 2007 at 05:23:47 PDT (GMT -0700)
View
this article at Wikipedia.org - Edit
this article at Wikipedia.org - Donate
to the Wikimedia Foundation