Explores the origin of the Earth's outer layer, the mantle, and the why and how of its mobility.
National Film Board of Canada, 1123 Broadway, Ste 307, New York, NY 10010, Phone: (212)629-8890, Toll-free: 800-542-2164, Fax: (866)299-9928, URL: http://www.nfb.ca
Available on VHS
Running time 18 minutes.
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