Films for the Humanities and Sciences

Geological Processes

This program covers erosion and canyons—how water, wind, and temperature changes sculpt the earth and create deep crevices; why the Grand Canyon serves as a good example of the geological history of our planet; volcanism and petrifaction, which explains why volcanic eruptions can be calm or explosive, depending on the chemical composition of magma and gas; why explosive eruptions create scoria cones like the Sunset Crater in Arizona; how volcanic ashes contribute to the fossilization of plants and animals; and astrogeology, whose computer-synthesized images teach us about the topography and geology of our planet. (23 minutes)

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Item#: BVL5635
Copyright date: ©1994


DVD	$99.95

Prices include public performance rights.
Only available in the US, the United Kingdom and South Africa.

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