The ability to map ocean-floor magnetization is key to infer past plate motions. The advent of geodesy in the Earth Sciences offered an independent snapshot of contemporary plate kinematics, averaged over decades. Early studies suggested plate-motions steadiness through geological time, because contemporary rates were similar to past 3-Myr averages. Recent data, however, show that geodetic and paleo-magnetic motions exhibit differences beyond confidence ranges, which might suggest geodesy...[Show more]
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