Hell's Crust from Savage Earth
Although it feels solid and hard beneath our feet, the outer surface of the Earth is a thin crust of fragile rock, fractured like the cracked shell of an egg. The pieces of the shell are Earth's tectonic plates -- there are 12 major ones -- and they float across a layer of soft rock like rafts in a stream, their motions driven by forces generated deep in the Earth. At their boundaries, the plates spread apart, converge, and slide past one another.
Material Type: Reference Material
Technical Format: HTML/Text
Date Added to MERLOT: July 06, 2009
Date Modified in MERLOT: July 06, 2009
Submitter: Dr. Troy Tenhet Ed.D.
Keywords: earth's crust, tectonics
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