Heat : blacksmith of the Earth

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Date
1958
Summary
This program will introduce volcanism and the rocks (igneous) which result from heat.  Igneous rocks are formed from molten rock and can befound either beneath the earth’s surface or on the surface.  Identification of them is made by texture.  this dependson where they cooled, and how fast the cooling took place.  You will examine the texture and characteristics of someof the common igneous rocks.  Granite is one of these and has many different forms.  Basalt is another, a dense rock with small crystals, but having a different chemical make-up from that of granite.  You’ll find out too about the formations in which igneous rocks are frequently found; dikes, sheets, sills, and laccoliths.  Finally you will see a miniature volcano erupt to introduce the most catastrophic form of volcanism, and the rocks formed from this kind of heat; obsidian, pumice, and scoria.
Contributors
Mary Lela Grimes; Robert Larsen; Betty Sears; WGBH-TV; Lowell Institute Cooperative Broadcasting Council; Massachusetts Audubon Society; Children's Museum of Boston
Publishers
National Educational Television; Indiana University Audio-Visual Center
Genres
Educational; Nature
Subject
Volcanism ; Igneous rocks ; Volcanoes.
Collection
National Educational Television
Unit
IUL Moving Image Archive
Language
English
Rights Statement
No Copyright - United States
Physical Description
1 Film (0:29:46); 16mm
Other Identifiers
IULMIA Film Database: 40000003272632; Other: GR00404485; MDPI Barcode: 40000003272632

Access Restrictions

This item is accessible by: the public.