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The Continuing Past

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Shows how modern equipment and methods are used by the Geological Survey of Canada (Department of Energy, Mines and Resources) to answer the riddle of the Earth's beginning and what lies below-ground. Rock samples of paper thinness, the spectrograph and the spectrometer, polarized light, chemical analysis--research techniques of many kinds and purposes are demonstrated in this film of geological discovery.

1966, 24 min 03 s

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