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Understanding the Earth(2nd Edition)
by I.G. Gass, P. L. Smith, R. C. Wilson, Peter J. Smith, Ian Graham Gass
Paperback, 388 Pages, Published 1977 by Artemis Press
ISBN-13: 978-0-85141-308-2, ISBN: 0-85141-308-0
"During the past decade, research by oceanographic geophysicists which has led to the wide acceptance that continents drift about the face of the earth and to the concept of sea-floor spreading has culminated in an all-embracing theory known as 'plate tectonics.' This theory draws sea-floor spreading, continental drift, crustal structures, and world patterns of seismic and volcanic activity together as aspects of one coherent picture. No ..."
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