Volcanism / produced by Intelecom.

Volcanoes provide clues about what is going on inside Earth. Animations illustrate volcanic processes and how plate boundaries are related to volcanism. Also surveys the various types of eruptions, craters, cones and vents, lava domes, magma, and volcanic rock. The 1980 eruption of Mount St. Helens...

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Bibliographic Details
Corporate Authors: INTELECOM Intelligent Telecommunications (Firm), Annenberg/CPB
Other Authors: Sadd, James, Gilfillan, David
Format: Video
Language:English
Published: South Burlington, Vt. : Annenberg/CPB, ©1992.
Series:Earth revealed ; 13.
Subjects:
Online Access:Click for online access