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Mechanical obstacles to the movement of continent-bearing platesSelected geophysical problems associated with the concept of continental drift as an incidental corollary of plate movement are discussed. The problems include the absence of a suitable plate-driving mechanism for plates with continental leading edges, the absence of the low-velocity zone under shields, and continental roots of 400 to 700 km depths. It is shown that if continental drift occurs, it must use mechanisms not now understood, or that it may not occur at all, plate movement being confined to ocean basins.
Document ID
19850052825
Document Type
Reprint (Version printed in journal)
Authors
Lowman, P. D., Jr. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: Geophysical Research Letters
Volume: 12
ISSN: 0094-8276
Subject Category
GEOPHYSICS
Distribution Limits
Public
Copyright
Other