The Earth's interior

A presentation of current knowledge concerning the earth's interior from seismic, gravitational, magnetic, and thermal observations. Explains that scientists have concluded that below the earth's crust is a plastic-like mantle and beneath this is a liquid core--possibly of extremely hot, dense, solid materials--which creates our magnetic field.
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  1. 16mm Filmography (legacy record) — title, year, creator, length, format, color, sound, genre, description, catalog record