http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Learn about volcanic magma and the role its components play in its rate of flow and explosiveness
Some volcanoes are explosive and massively destructive. Others are relatively sedate, oozing liquid rock. The nature of their magma explains some of the difference.
[Ed Moragne, narrator] ; [Theodore Pappas, director] ; [Kurt Heintz, direction].
Title from resource description page (viewed February 2, 2022).