PENNSYLVANIA - A KEYSTONE GEOLOGY:
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INTERNAL PROCESSES / Volcanoes
Further Reading
Gallant, Roy A.
Geysers: When Earth Roars.
NY: Franklin Watts, 1997. Discusses various aspects of geysers including their formation, location, anatomy, use by humans, and extinction. Ages 9 - 12.
Buy at Randys Books
PENNSYLVANIA - A KEYSTONE GEOLOGY:
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