Further Reading
P. Morrison et al. Exploration of the Universe. Saunders College
Publishing.
J. B. Murphy and R.D. Nance. Mountain Building and the Supercontinent Cycle.
Scientific American, April 1992.
P. Cattermole and P. Moore The Story of the Earth. Cambridge University
Press, 1985.
C. Frohlich. Deep Earthquakes. Scientific American, January 1989.
