<http://schema.org/description>
"London,  Aug  26  (ANI): A new study  by  seismologists  at  the University  of California, Berkeley, has revealed that the  North American continent is not one thick, rigid slab, but a layer cake of ancient, 3 billion-year-old rock on top of much newer material probably less than 1 billion years old."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.oneindia.com/2010/08/26/northamerican-continent-is-a-layer-cakestudy.html>