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Book Chapter

Theoretical Aspects of Continental Drift1

By
Harold Jeffreys
Harold Jeffreys
St. John's College, Cambridge University, England.
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Published:
January 01, 1974

Abstract

According to a law of imperfection of elasticity (the modified Lomnitz law), creep at small stresses, under a constant applied stress, increases with time as tα (α = about 0.2). Use of this law makes it possible to avoid contradictions with actual observations as given by increases like log t or t. Moreover, the modified law also explains the damping of the 14-monthly nutation (Chandler wobble), the sharpness of transverse seismic waves at great distances, the moon's rotation, and the persistence of the moon's dynamic ellipiticities. However, the damping action of the modified Lomnitz law makes it impossible for convection to take place. Thus, continental drift—by convection, seafloor spreading, and/or plate tectonics—cannot occur. Appreciation by geologists of the significance of the modified Lomnitz law is essential if progress in geology and geophysics is to continue.

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Contents

AAPG Memoir

Plate Tectonics—Assessments and Reassessments

Charles F. Kahle
Charles F. Kahle
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American Association of Petroleum Geologists
Volume
23
ISBN electronic:
9781629812182
Publication date:
January 01, 1974

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References

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