Daily Archives: August 27, 2010

North American Continent Is a Layer Cake, Scientists Discover

Posted on August 27, 2010 by Rashid Faridi

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, according to a new study by seismologists at … Continue reading →

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