Data from field geology, structural geology, stratigraphy, paleontology, geophysics, and oceanography are brought to bear on the problems of plate tectonics. Many data favor the concept, whereas many do not. A definitive work on the correctness, or incorrectness, of the plate-tectonics concept has yet to be written because present data are insufficient to make a final assessment.
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The general theme of this publication is the assessment and reassessment of various data, observations, and ideas about the earth as they relate to the concept that has come to be known as plate tectonics. Much widely scattered material was brought together for this publication, and its 24 papers contain an abundance of worldwide references that are important in studying plate tectonics.