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Rocks that Originate Underground
- 1966 ----- color ----- 22 min ----- 16mm
- (Earth-Science series) Explores the origin of volcanic, plutonic and metamorphic rocks. The nature of crystals and the condition necessary for crystal growth are examined in detail. An investigation is carried out using both field evidence and experiments and analogies in the laboratory. Discusses rock cycle.
- Topics: (Geology)
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