16mm Filmography
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The Wandering Continents - A Study Of Rock Magnetism

Creator: Gateway Educational Media.

Format: 16mm

Sound: sound

Description: Shows how a study of the residual magnetism in certain old rocks suggests that the magnetic poles have moved extensively in past ages. Discusses this theory.

No holdings listed.

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Original permalink · Record added: 2023-02-27 05:37:24