The hidden Earth

Year Published: 1960

Creator: U.S. National Academy of Sciences

Format: 16mm

Color: Color

Sound: sound

Description: Illustrates, using animation and live-action photography, man's efforts to learn more about the structure of the earth through study of deep mine shafts, deep wells, volcanoes, and earthquakes. Describes early theories of the earth's structure and the present world-wide efforts to discover more about its structure. Points out means scientists use to study earthquakes, how this study contributes to an explanation of the structure of the earth's interior, and the use of explosion seismology to produce artificial earthquakes. The intense heat of the earth's interior is evidenced in volcanic eruptions, geysers, and bubbling mud. The plan for placing a seismograph on the moon and the "Mohole Project'' are briefly discussed.

Complete Record: , The Hidden Earth. U.S. National Academy Of Sciences. 27 Min., Sd., Color, 16 Mm. © U.S. National Academy Of Sciences; 1nov60; Mp10975. , The Hidden Earth. U.S. National Academy Of Sciences. 27 Min., Sd., Color, 16 Mm. © U.S. National Academy Of Sciences; 1nov60; Mp10975. NOTE: Two (or more) records have been merged together to create this data.